Garmin Forerunner 70 vs Xiaomi Watch S4 41mm
Size, specs & wrist fit compared
As an Amazon Associate, WatchFitTool earns from qualifying purchases.
Which one fits you
On wrists narrower than about 45mm, the Xiaomi Watch S4 41mm is the safer pick — it stays proportionate down to roughly 43mm, where the Garmin Forerunner 70 starts to hang over the edge. Above 45mm both sit cleanly, and the Garmin Forerunner 70 gives you more presence.
The Garmin Forerunner 70 wears larger than the Xiaomi Watch S4 41mm (42.6mm vs 41.2mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Xiaomi Watch S4 41mm is the slimmer of the two (9.5mm vs 11.9mm), so it slides under a cuff more easily.
On the wrist the Xiaomi Watch S4 41mm feels lighter (32g vs 40g, case only).
The Garmin Forerunner 70 is thinner than 84% of the 43mm watches we track and the Xiaomi Watch S4 41mm than 98% of the 41mm ones — so both wear flatter than their widths suggest.
The Garmin Forerunner 70 is 1.4mm wider, 1.4mm longer, 2.4mm thicker and 8g heavier than the Xiaomi Watch S4 41mm. Both are circular.
Garmin
Forerunner 70
Xiaomi
Watch S4 41mm
Switch or add watches
Garmin
Forerunner 70
Xiaomi
Watch S4 41mm
Watch Fit Tool
For sports watches, lug-to-lug (L2L) is what matters most — it decides whether a watch overhangs your wrist. Bulky is fine; overhang is not.
Lay your arm flat on a table, palm facing up
Measure across the flat top of your wrist (not the circumference)
Measure at the point where you wear your watch — typically just below the wrist bone
Wrist width ≠ circumference. We need the flat width across the top of your wrist where the watch sits, not how far around.
Garmin Forerunner 70
Case 42.6mm · Lug-to-lug 42.6mm · Thickness 11.9mm · 40g
Balanced Fit
42.6mm on a 55mm wrist
Comfortably inside the edges of your wrist, and it seats and sits low enough to wear without thinking about it.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 42.6mm, so you could go bigger.
- 1. Lay your arm flat, palm up.
- 2. Measure the flat width across the top of your wrist — not the circumference.
- 3. Measure where you wear it, just below the wrist bone.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. The default: depth about seven tenths of the width. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist6.2mm spare each side
Comfortable, with visible skin either side.
- Off the wrist11.9mm off the skin
Normal sports-watch height for a wrist this size. (11.9mm case, back against the skin)
- How it seats~4.2mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist40g
Light enough to forget you have it on. (0.7g per mm of wrist)
Xiaomi Watch S4 41mm
Case 41.2mm · Lug-to-lug 41.2mm · Thickness 9.5mm · 32g
Balanced Fit
41.2mm on a 55mm wrist
Comfortably inside the edges of your wrist, and it seats and sits low enough to wear without thinking about it.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 41.2mm, so you could go bigger.
- 1. Lay your arm flat, palm up.
- 2. Measure the flat width across the top of your wrist — not the circumference.
- 3. Measure where you wear it, just below the wrist bone.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. The default: depth about seven tenths of the width. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist6.9mm spare each side
Comfortable, with visible skin either side.
- Off the wrist9.5mm off the skin
Sits low enough to disappear under a cuff. (9.5mm case, back against the skin)
- How it seats~3.8mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist32g
Light enough to forget you have it on. (0.6g per mm of wrist)
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
- Garmin Forerunner 7042.6mm · 11.9mm thick
- Xiaomi Watch S4 41mm41.2mm · 9.5mm thick
3D preview
Garmin Forerunner 70 vs Xiaomi Watch S4 41mm on a wrist
Sized to your own wrist, turned any way you like.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
Battery life compared
Furthest apart in Smartwatch mode, where the Garmin Forerunner 70 lasts 1.6× as long as the Xiaomi Watch S4 41mm (13 days against 8 days).
Garmin Forerunner 70Xiaomi Watch S4 41mm
Smartwatch
13 days8 days
Specifications
The short version
6 key specs| Spec | GarminForerunner 70 | XiaomiWatch S4 41mm |
|---|---|---|
| Case Width | 42.6mm | 41.2mm |
| Thickness | 11.9mm | 9.5mm |
| Weight | 40g | 32g |
| Shape | Circular | Circular |
| Display type | AMOLED (optional always-on mode) | OLED/AMOLED |
| Released | 2026 | 2025 |
Every specification
316 specs| Spec | Garmin Forerunner 70 | Xiaomi Watch S4 41mm |
|---|---|---|
| Overview | ||
| Family | Garmin | — |
| General | ||
| Weight | 40 g | — |
| Battery life | Smartwatch mode: Up to 13 days (5 days display always-on) Battery Saver Smartwatch mode: Up to 28 days GPS-Only GNSS mode: Up to 23 hours All-Systems GNSS mode: Up to 16 hours See Details | — |
| Battery type | Lithium ion | — |
| Display Size | 1.2" (30.4 mm) diameter | — |
| Color display | Yes | — |
| Lens material | chemically strengthened glass | — |
| Physical size | 42.6 x 42.6 x 11.9 mm Fits wrists with a circumference of 126-203 mm | — |
| Bezel material | fiber-reinforced polymer | — |
| Memory/History | 512 MB | — |
| Strap material | silicone | — |
| Charging method | Garmin proprietary plug charger | — |
| Large font option | Yes | — |
| Display resolution | 390 x 390 pixels | — |
| Quick Release bands | yes (20 mm, Industry standard) | — |
| Sensors | ||
| Stocks | Yes | — |
| Calendar | Yes | — |
| Passcode | Yes | — |
| Calculator | Yes | — |
| Color shift | Yes | — |
| Connectivity | Bluetooth®, ANT+® | — |
| Garmin Share | Yes | — |
| Hourly alert | Yes | — |
| Color filters | Yes | — |
| Find My Phone | Yes | — |
| Evening report | Yes | — |
| Morning report | Yes | — |
| Red shift mode | Yes | — |
| Weather forecasts | Yes | — |
| Smart Notifications | Yes | — |
| Smartphone compatibility | iPhone®, Android™ | — |
| Controls smartphone music | Yes | — |
| On-device Connect IQ™ Store | Yes | — |
| Find My Phone during GPS activity | Yes | — |
| Pairs with Garmin Connect™ Mobile | Yes | — |
| Compatible with Garmin Messenger app | Yes | — |
| Find My Garmin (helps locate lost device) | Yes | — |
| Battery saver (customizable low power watch) | Yes | — |
| Realtime settings sync with Garmin Connect™ mobile | Yes | — |
| View images from notifications on watch (Android™ only) | Yes | — |
| Text response/reject phone call with text (Android™ only) | Yes | — |
| Connect IQ™ (downloadable watch faces, data fields and apps) | Yes | — |
| has GPS | — | Yes |
| has a compass | — | Yes |
| Has a barometer | — | Yes |
| has a gyroscope | — | Yes |
| Has a cadence sensor | — | No |
| has an accelerometer | — | Yes |
| Monitors perspiration | — | No |
| Has a heart rate monitor | — | Yes |
| Has a temperature sensor | — | Yes |
| Monitors blood oxygenation levels | — | Yes |
| Variant | ||
| Color | Black | — |
| Available Colors | Citron; Whitestone; Black; Tidal Blue; Soft Pink; Cool Lavender | — |
| Clock Features | ||
| Sleep | yes (advanced) | — |
| Hydration | yes (in Garmin Connect™ and optional Connect IQ™ widget) | — |
| Breathwork | Yes | — |
| Fitness age | Yes | — |
| Sleep coach | Yes | — |
| Health status | Yes | — |
| Nap detection | Yes | — |
| All-day stress | Yes | — |
| Women's health | yes (in Garmin Connect™ and optional Connect IQ™ widget) | — |
| Health snapshot | Yes | — |
| Respiration rate | Yes | — |
| Lifestyle logging | Yes | — |
| Resting heart rate | Yes | — |
| Breathing variations | Yes | — |
| Relaxation reminders | Yes | — |
| Abnormal heart rate alerts | yes (high and low) | — |
| Relaxation breathing timer | Yes | — |
| Body Battery™ energy monitor | Yes | — |
| Heart rate (constant, every second) | Yes | — |
| Cycling Features | ||
| Pool swim workouts | Yes | — |
| Time and distance alerts | Yes | — |
| Auto rest (pool swim only) | Yes | — |
| Drill logging (pool swim only) | Yes | — |
| Countdown start (pool swim only) | Yes | — |
| Underwater wrist-based heart rate | Yes | — |
| "Repeat on" rest timer (pool swim only) | Yes | — |
| Basic rest timer (up from 0) (pool swim only) | Yes | — |
| Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only) | Yes | — |
| Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories) | Yes | — |
| Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) | Yes | — |
| Running Features | ||
| Auto rest | Yes | — |
| UltraTrac mode | Yes | — |
| Future elevation plot | Yes | — |
| Distance to destination | Yes | — |
| Sun and moon information | Yes | — |
| Rest Timer (Ultra Run only) | Yes | — |
| What You'll Love | ||
| Timer | Yes | — |
| Stopwatch | Yes | — |
| Time/date | Yes | — |
| Alarm clock | Yes | — |
| Touchscreen | Yes | — |
| Display type | AMOLED (optional always-on mode) | — |
| Water rating | 5 ATM | — |
| GPS Time Sync | Yes | — |
| Training status | Yes | — |
| Smart wake alarm | Yes | — |
| Training readiness | Yes | — |
| Sunrise/sunset times | Yes | — |
| Pulse Ox blood oxygen | yes (spot-check, and optional all-day and in sleep) | — |
| Sleep score and insights | Yes | — |
| Automatic daylight saving time | Yes | — |
| Battery life (smartwatch mode) | Up to 13 days | — |
| Activity Profiles | ||
| Assistance | Yes | — |
| Live Event Sharing | Android™ Only | — |
| Incident Detection during select activities | Yes | — |
| Incident detection alert on phone for wearables | Yes | — |
| Outdoor Recreation | ||
| Up Ahead | Yes | — |
| TracBack® | Yes | — |
| Back to start | Yes | — |
| Point-to-point navigation | Yes | — |
| Bread crumb trail in real time | Yes | — |
| Daily Smart Features | ||
| HIIT workouts | Yes | — |
| Yoga workouts | Yes | — |
| Cardio workouts | Yes | — |
| Pilates workouts | Yes | — |
| Strength workouts | Yes | — |
| Garmin Running Coach | Yes | — |
| Garmin fitness coach | Yes | — |
| Garmin Coach - Strength | Yes | — |
| Garmin Running Coach Experts | Yes | — |
| On-screen workout muscle maps | Yes | — |
| Garmin Coach - Prebuilt Cycling Plans | Yes | — |
| Daily Suggested Workout - Running (Pace and Heart Rate Based) | Yes | — |
| Mapping & Navigation | ||
| Courses | Yes | — |
| Race an activity | Yes | — |
| Compatible with Varia™ lights | Yes | — |
| Compatible with Varia headlight camera | Yes | — |
| Speed and cadence sensor support (w/sensor) | Yes | — |
| Compatible with Varia™ radar (rear-facing radar) | Yes | — |
| Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) | Yes | — |
| Activity Tracking Features | ||
| % HRR | Yes | — |
| % HR max | Yes | — |
| HR zones | Yes | — |
| HR alerts | Yes | — |
| Shortcuts | Yes | — |
| HRV status | Yes | — |
| Load ratio | Yes | — |
| Manual lap | Yes | — |
| Rest timer | Yes | — |
| Auto max HR | Yes | — |
| Finish time | Yes | — |
| HR calories | Yes | — |
| Voice alerts | Yes | — |
| Custom alerts | Yes | — |
| Physio TrueUp | Yes | — |
| Recovery time | Yes | — |
| Training load | Yes | — |
| VO2 Max (Run) | Yes | — |
| Course guidance | Yes | — |
| Training effect | Yes | — |
| Race an Activity | Yes | — |
| Advanced workouts | Yes | — |
| Interval training | Yes | — |
| Race glance/widget | Yes | — |
| Training load focus | Yes | — |
| VO2 Max (Trail Run) | Yes | — |
| GPS speed and distance | Yes | — |
| Configurable lap alerts | Yes | — |
| Customizable data pages | Yes | — |
| Unified training status | Yes | — |
| Touch and/or button lock | Yes | — |
| Activity history on watch | Yes | — |
| Downloadable training plans | Yes | — |
| Training effect (anaerobic) | Yes | — |
| HRM running pace and distance | Yes | — |
| Customizable activity profiles | Yes | — |
| Auto Pause® automatic timer halt | Yes | — |
| Respiration rate (during exercise) | yes (with compatible accessory) | — |
| Auto Lap® interval tracking feature | Yes | — |
| Primary benefit (Training Effect labels) | Yes | — |
| HR broadcast (broadcasts HR data over ANT+® to paired devices) | Yes | — |
| Improved interval (includes open repeats, intervals data page, rest screen and auto detection) | Yes | — |
| Workout and Training Plans | ||
| Gym | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Indoor Rowing, Jump Roping | — |
| Swim | Pool Swimming | — |
| Cycling | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross | — |
| Wellness | Walking, Pilates, Yoga , Indoor Walking, Mobility, Breathwork | — |
| In the ring | Boxing, Mixed Martial Arts | — |
| Team sports | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball | — |
| Motor sports | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling | — |
| On the water | Stand Up Paddleboarding, Rowing, Kayaking, Snorkeling | — |
| Racket sports | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball | — |
| Indoor running | Treadmill Running, Indoor Track Running, Virtual Running | — |
| Outdoor running | Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Racing | — |
| Snow and winter | Skiing, Snowboarding, XC Classic Skiing, XC Skate Skiing, Ice Skating, Snowshoeing | — |
| Outdoor recreation | Hiking, Rucking, Mountaineering, Horseback Riding, Disc Golf, Archery | — |
| Other activity profiles | Inline Skating | — |
| Health & Wellness Monitoring | ||
| GPS | Yes | — |
| GLONASS | Yes | — |
| Galileo | Yes | — |
| Accelerometer | Yes | — |
| Ambient light sensor | Yes | — |
| Pulse Ox Blood Oxygen Saturation Monitor | Yes | — |
| Garmin Elevate™ wrist heart rate monitor | Yes | — |
| Safety and Tracking Features | ||
| TrueUp™ | Yes | — |
| Move IQ™ | Yes | — |
| Step counter | Yes | — |
| Calories burned | Yes | — |
| Distance traveled | Yes | — |
| Intensity minutes | Yes | — |
| Automatic rep counting | Yes | — |
| Move Alert movement options | Yes | — |
| Garmin Connect™ Challenges app | yes (optional Connect IQ app) | — |
| Move alerts (displays on device after a period of inactivity) | Yes | — |
| Auto goal (learns your activity level and assigns a daily step goal) | Yes | — |
| Training, Planning and Analysis Features | ||
| Run workouts | Yes | — |
| Quick workout | Yes | — |
| Running power | Yes | — |
| Race predictor | Yes | — |
| Foot pod capable | Yes | — |
| Running dynamics | Yes | — |
| Run/Walk/Stand detection | Yes | — |
| Stride length (real time) | Yes | — |
| PacePro™ Pacing Strategies | Yes | — |
| Vertical oscillation and ratio | Yes | — |
| Ground contact time and balance | yes (GCT balance with accessory) | — |
| GPS-based distance, time and pace | Yes | — |
| Course- and weather-specific race predictor | Yes | — |
| Cadence (provides real-time number of steps per minute) | Yes | — |
| Design | ||
| width | — | 41.2 |
| height | — | 41.2 |
| volume | — | 16.13 cm³ |
| weight | — | 32 g |
| thickness | — | 9.5 |
| ATM rating | — | 5 ATM |
| resolution | — | 466 x 466 px |
| screen size | — | 1.32 inches |
| Display type | — | OLED/AMOLED |
| Has a display | — | Yes |
| pixel density | — | 320 ppi |
| water resistance | — | Waterproof |
| Always-On Display | — | Yes |
| has a touch screen | — | Yes |
| is designed for kids | — | No |
| Watch band is replaceable | — | Yes |
| Has sapphire glass display | — | Yes |
| has branded damage-resistant glass | — | No |
| Battery | ||
| battery life | — | 8 days |
| battery power | — | 320 mAh |
| has wireless charging | — | No |
| has a removable battery | — | No |
| Has a solar power battery | — | No |
| has a rechargeable battery | — | Yes |
| Features | ||
| release date | — | 2025-06-26 |
| Has a stopwatch | — | Yes |
| Has smart alarm | — | No |
| warranty period | — | 1 years |
| Has call control | — | Yes |
| Has silent alarm | — | Yes |
| has HRV tracking | — | Yes |
| internal storage | — | 32GB |
| measures VO2 max | — | Yes |
| Has notifications | — | Yes |
| Has ECG technology | — | No |
| Locates your phone | — | Yes |
| has a front camera | — | No |
| has fall detection | — | Yes |
| has voice commands | — | Yes |
| Acquires GPS faster | — | Yes |
| Has vibrating alerts | — | Yes |
| number of microphones | — | 1 |
| shows readiness level | — | Yes |
| Can be used to answer calls | — | Yes |
| measures resting heart rate | — | Yes |
| has irregular heart rate warnings | — | No |
| has fast/slow heart rate notifications | — | Yes |
| Has a built-in camera remote control function | — | Yes |
| Connectivity | ||
| has NFC | — | Yes |
| SIM cards | — | 1 eSIM |
| supports ANT+ | — | No |
| supports Wi-Fi | — | No |
| supports Galileo | — | Yes |
| Bluetooth version | — | 5.4 |
| has a cellular module | — | Yes |
| Is compatible with iOS | — | Yes |
| Is compatible with Android | — | Yes |
| Miscellaneous | ||
| Has passcode | — | Yes |
| Is compatible with Windows | — | No |
| Is compatible with Mac OS X | — | No |
| has an external memory slot | — | No |
| has a battery level indicator | — | Yes |
| has a socket for a 3.5 mm audio jack | — | No |
| App & Software | ||
| Ad-free | — | Yes |
| Free app | — | Yes |
| Has coaching | — | No |
| Includes maps | — | Yes |
| Supports routes | — | No |
| Has achievements | — | Yes |
| Has goal setting | — | Yes |
| Has exercise diary | — | Yes |
| Predicts ovulation | — | Yes |
| Can be personalised | — | Yes |
| Has weight tracking | — | Yes |
| Predicts start date | — | Yes |
| Tracks water intake | — | Yes |
| Has inactivity alerts | — | Yes |
| Has period notifications | — | Yes |
| Has temperature tracking | — | Yes |
| Doesn’t require account | — | No |
| Provides activity reports | — | Yes |
| Counts how many calories you've burned | — | Yes |
| Activity tracking | ||
| Measures pace | — | Yes |
| Tracks distance | — | Yes |
| Tracks elevation | — | Yes |
| Tracks your sleep | — | Yes |
| Tracks steps taken | — | Yes |
| Designed for diving | — | No |
| Has a route tracker | — | Yes |
| Has exercise tagging | — | Yes |
| Tracks calorie intake | — | Yes |
| Provides sleep reports | — | Yes |
| Detects activities automatically | — | Yes |
| Has a stroke counter for swimming | — | Yes |
Wrist Fit
Garmin Forerunner 70
Sits best on wrists ~45–61mm wide (≈ 12.0–16.3cm circumference).
Xiaomi Watch S4 41mm
Sits best on wrists ~43–59mm wide (≈ 11.5–15.8cm circumference).
Frequently Asked Questions
Is the Garmin Forerunner 70 bigger than the Xiaomi Watch S4 41mm?
The Garmin Forerunner 70 is bigger — 42.6mm vs 41.2mm case width.
Which fits a smaller wrist better, the Garmin Forerunner 70 or the Xiaomi Watch S4 41mm?
The Garmin Forerunner 70 suits wrists around 45–61mm wide, and the Xiaomi Watch S4 41mm around 43–59mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Garmin Forerunner 70 and Xiaomi Watch S4 41mm side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.