Apple Watch SE 3 GPS + Cellular 40mm vs Garmin Lily 2
Size, specs & wrist fit compared
As an Amazon Associate, WatchFitTool earns from qualifying purchases.
Which one fits you
On wrists narrower than about 42mm, the Garmin Lily 2 is the safer pick — it stays proportionate down to roughly 37mm, where the Apple Watch SE 3 GPS + Cellular 40mm starts to hang over the edge. Above 42mm both sit cleanly, and the Apple Watch SE 3 GPS + Cellular 40mm gives you more presence.
The Garmin Lily 2 wears larger than the Apple Watch SE 3 GPS + Cellular 40mm (35.4mm vs 34mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Garmin Lily 2 is the slimmer of the two (10.1mm vs 10.7mm), so it slides under a cuff more easily.
On the wrist the Garmin Lily 2 feels lighter (24.4g vs 26.4g, case only).
Both are middle-of-the-pack for thickness among the 34mm and 35mm watches in the database.
The Garmin Lily 2 is 1.4mm wider, 4.6mm shorter, 0.6mm thinner and 2g lighter than the Apple Watch SE 3 GPS + Cellular 40mm.
Apple
Watch SE 3 - GPS + Cellular · 40mm
Garmin
Lily® 2
Switch or add watches
Apple
Watch SE 3 - GPS + Cellular · 40mm
Garmin
Lily® 2
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.
Measure at the point where you wear your watch — typically just below the wrist bone.
Flat width — lay your arm on a table, palm facing up, and measure straight across the top of your wrist with a ruler. Bone to bone; do not follow the curve down the sides.
Around — wrap a tape measure snugly round the wrist. No tape? Wrap a strip of paper, mark the overlap and hold the strip against a ruler.
Width ≠ circumference. They are different numbers — around 170mm is about 64mm across — so set the toggle to whichever one you actually measured before you type it in.
Apple Watch SE 3 - GPS + Cellular · 40mm
Case 40.0mm · Lug-to-lug 40.0mm · Thickness 10.7mm · 26g
Balanced Fit
40mm 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 40mm, so you could go bigger.
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist7.5mm spare each side
Comfortable, with visible skin either side.
- Off the wrist10.7mm off the skin
Normal sports-watch height for a wrist this size. (10.7mm case, back against the skin)
- How it seats~3.4mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist26g
Light enough to forget you have it on. (0.5g per mm of wrist)
Garmin Lily® 2
Case 35.4mm · Lug-to-lug 35.4mm · Thickness 10.1mm · 24g
Understated
35.4mm on a 55mm wrist
Well inside your wrist on every measurement — you have room to go a size up if you want more presence.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 35.4mm, so you could go bigger.
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist9.8mm spare each side
Comfortable, with visible skin either side.
- Off the wrist10.1mm off the skin
Normal sports-watch height for a wrist this size. (10.1mm case, back against the skin)
- How it seats~2.3mm under the rim
Sits flat on the wrist with contact right across the case back.
- Weight on the wrist24g
Light enough to forget you have it on. (0.4g per mm of wrist)
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
- Apple Watch SE 3 - GPS + Cellular · 40mm34mm × 40mm · 10.7mm thick
- Garmin Lily® 235.4mm · 10.1mm thick
3D preview
Apple Watch SE 3 - GPS + Cellular · 40mm vs Garmin Lily® 2 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
Runtime for every power mode either watch publishes, aligned by mode.
Apple Watch SE 3 GPS + Cellular 40mmGarmin Lily 2
Battery life
—5 daysBattery Saver
32 hours—Smartwatch
0.75 days—
Specifications
The short version
7 key specs| Spec | AppleWatch SE 3 - GPS + Cellular · 40mm | GarminLily® 2 |
|---|---|---|
| Case Width | 34mm | 35.4mm |
| Lug-to-Lug | 40mm | 35.4mm |
| Thickness | 10.7mm | 10.1mm |
| Weight | 26.4g | 24.4g |
| Shape | Rectangle | Circular |
| Display type | OLED/AMOLED | Liquid Crystal |
| Released | 2025 | 2024 |
Every specification
201 specs| Spec | Apple Watch SE 3 - GPS + Cellular · 40mm | Garmin Lily® 2 |
|---|---|---|
| Design | ||
| width | 34 | — |
| height | 40 | — |
| volume | 14.55 cm³ | — |
| weight | 26.4 g | — |
| thickness | 10.7 | — |
| ATM rating | 5 ATM | — |
| resolution | 324 x 394 px | — |
| screen size | 1.57 inches | — |
| Display type | OLED/AMOLED | — |
| Has a display | Yes | — |
| pixel density | 325 ppi | — |
| maximum altitude | 10000 feet | — |
| water resistance | Waterproof | — |
| Always-On Display | Yes | — |
| has a touch screen | Yes | — |
| waterproof depth rating | 50 m | — |
| Watch band is replaceable | Yes | — |
| Has sapphire glass display | No | — |
| maximum operating temperature | 35 °C | — |
| Ingress Protection (IP) rating | IP68 | — |
| has branded damage-resistant glass | Yes | — |
| lowest potential operating temperature | 0 °C | — |
| Battery | ||
| battery life | 0.75 days | — |
| has wireless charging | Yes | — |
| has a removable battery | No | — |
| Has a solar power battery | No | — |
| has a rechargeable battery | Yes | — |
| battery life in power save mode | 32 hours | — |
| Sensors | ||
| 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 | No | — |
| Accelerometer | — | Yes |
| Ambient light sensor | — | Yes |
| Pulse Ox Blood Oxygen Saturation Monitor | — | Yes |
| Garmin Elevate™ wrist heart rate monitor | — | Yes |
| Features | ||
| release date | 2025-09-09 | — |
| Has a stopwatch | Yes | — |
| Has smart alarm | Yes | — |
| Has call control | Yes | — |
| Has silent alarm | Yes | — |
| internal storage | 64GB | — |
| measures VO2 max | No | — |
| Has notifications | Yes | — |
| Locates your phone | Yes | — |
| has a front camera | No | — |
| has fall detection | Yes | — |
| has voice commands | Yes | — |
| Acquires GPS faster | No | — |
| Has vibrating alerts | Yes | — |
| number of microphones | 1 | — |
| shows readiness level | No | — |
| Can be used to answer calls | Yes | — |
| measures resting heart rate | Yes | — |
| has irregular heart rate warnings | Yes | — |
| has fast/slow heart rate notifications | Yes | — |
| Has a built-in camera remote control function | Yes | — |
| Connectivity | ||
| has NFC | Yes | — |
| SIM cards | 1 eSIM | — |
| Wi-Fi version | Wi-Fi 4 (802.11n) | — |
| supports ANT+ | No | — |
| supports Wi-Fi | Yes | — |
| supports Galileo | Yes | — |
| Bluetooth version | 5.3 | — |
| has a cellular module | Yes | — |
| Is compatible with iOS | Yes | — |
| Is compatible with Android | No | — |
| Miscellaneous | ||
| has aptX | No | — |
| Has passcode | Yes | — |
| Has auto pause | Yes | — |
| has crash detection | Yes | — |
| Is compatible with Windows | No | — |
| Is compatible with Mac OS X | Yes | — |
| has an external memory slot | No | — |
| Compatible with smart scales | Yes | — |
| has a battery level indicator | Yes | — |
| has a socket for a 3.5 mm audio jack | No | — |
| Compatible with external heart rate monitors | Yes | — |
| App & Software | ||
| Ad-free | Yes | — |
| Free app | Yes | — |
| Has coaching | No | — |
| Has achievements | Yes | — |
| Has goal setting | Yes | — |
| Has exercise diary | Yes | — |
| Predicts ovulation | Yes | — |
| Can be personalised | Yes | — |
| Has weight tracking | No | — |
| Predicts start date | Yes | — |
| Tracks water intake | No | — |
| Has inactivity alerts | Yes | — |
| Has period notifications | Yes | — |
| Has temperature tracking | Yes | — |
| Provides activity reports | Yes | — |
| Counts how many calories you've burned | Yes | — |
| Activity tracking | ||
| Measures pace | Yes | — |
| Tracks distance | Yes | — |
| Tracks elevation | Yes | — |
| Designed for golf | No | — |
| Tracks your sleep | Yes | — |
| Tracks steps taken | Yes | — |
| Designed for diving | No | — |
| Has a route tracker | Yes | — |
| Has exercise tagging | Yes | — |
| Has multi-sport mode | Yes | — |
| Tracks calorie intake | No | — |
| Provides sleep reports | Yes | — |
| Detects activities automatically | Yes | — |
| Has a stroke counter for swimming | Yes | — |
| Overview | ||
| Family | — | Garmin |
| General | ||
| Battery life | — | Up to 5 days See Details |
| Display Size | — | 1.00” x 0.84” (25.4 mm x 21.3 mm) |
| Case material | — | anodized aluminum |
| Color display | — | no (16 level grayscale) |
| Lens Material | — | Corning® Gorilla® Glass 3 |
| Bezel Material | — | anodized aluminum |
| Memory/History | — | 7 timed activities; 14 days of activity tracking data |
| Strap material | — | silicone |
| Charging method | — | Garmin proprietary clip charger |
| Display resolution | — | 240 x 201 pixels |
| Quick Release bands | — | Yes |
| Product Info | ||
| Main SKU | — | 010-02839-01 |
| Product ID | — | 950277 |
| Product Name | — | Lily® 2 |
| Release Date | — | 1/8/2024 |
| Product Variation | — | Metallic Lilac with Lilac Silicone Band |
| Clock Features | ||
| Timer | — | Yes |
| Stopwatch | — | Yes |
| Time/date | — | Yes |
| Alarm clock | — | Yes |
| Automatic daylight saving time | — | Yes |
| Cycling Features | ||
| Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) | — | Yes |
| Running Features | ||
| GPS-based distance, time and pace | — | yes (Connected GPS only) |
| What You'll Love | ||
| Touchscreen | — | Yes |
| Display type | — | Liquid Crystal |
| Water rating | — | Swim, 5 ATM |
| Pulse Ox blood oxygen | — | yes (spot-check and optionally in sleep) |
| Sleep score and insights | — | Yes |
| Battery life (smartwatch mode) | — | Up to 5 days |
| Activity Profiles | ||
| Gym | — | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Indoor Rowing, Dance Fitness, Jump Roping |
| Swim | — | Pool Swimming |
| Cycling | — | Biking |
| Wellness | — | Walking, Pilates, Yoga, Breathwork |
| Indoor running | — | Treadmill Running |
| Outdoor running | — | Running |
| Daily Smart Features | ||
| Calendar | — | Yes |
| Passcode | — | Yes |
| Connectivity | — | Bluetooth® |
| Connected GPS | — | Yes |
| Find My Phone | — | Yes |
| Find My Watch | — | Yes |
| Morning report | — | Yes |
| Weather forecasts | — | Yes |
| Smart Notifications | — | Yes |
| Smartphone compatibility | — | iPhone®, Android™ |
| Controls smartphone music | — | Yes |
| Pairs with Garmin Connect™ Mobile | — | Yes |
| Realtime settings sync with Garmin Connect™ mobile | — | Yes |
| Text response/reject phone call with text (Android™ only) | — | Yes |
| Activity 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 |
| Move alerts (displays on device after a period of inactivity) | — | Yes |
| Auto goal (learns your activity level and assigns a daily step goal) | — | Yes |
| Health & Wellness Monitoring | ||
| Sleep | — | yes (advanced) |
| Hydration | — | Yes |
| Breathwork | — | Yes |
| Fitness age | — | yes (in app) |
| All-day stress | — | Yes |
| Women's health | — | Yes |
| Respiration rate | — | Yes |
| Resting heart rate | — | Yes |
| Relaxation reminders | — | Yes |
| Abnormal heart rate alerts | — | yes (high and low) |
| Relaxation breathing timer | — | Yes |
| Body Battery™ energy monitor | — | Yes |
| Wrist-based heart rate (constant, every second) | — | Yes |
| Safety and Tracking Features | ||
| Assistance | — | Yes |
| Incident Detection during select activities | — | Yes |
| Training, Planning and Analysis Features | ||
| % HR max | — | Yes |
| HR zones | — | Yes |
| HR alerts | — | Yes |
| HR calories | — | Yes |
| Custom alerts | — | Yes |
| Physio TrueUp | — | Yes |
| VO2 Max (Run) | — | Yes |
| GPS speed and distance | — | yes (Connected GPS only) |
| Customizable data pages | — | Yes |
| Customizable activity profiles | — | Yes |
| Respiration rate (during exercise) | — | Yoga and Breathwork only |
| Auto Lap® interval tracking feature | — | Yes |
Wrist Fit
Apple Watch SE 3 GPS + Cellular 40mm
Sits best on wrists ~42–57mm wide (≈ 11.2–15.2cm circumference).
Garmin Lily 2
Sits best on wrists ~37–51mm wide (≈ 9.9–13.6cm circumference).
Frequently Asked Questions
Is the Apple Watch SE 3 GPS + Cellular 40mm bigger than the Garmin Lily 2?
The Garmin Lily 2 is bigger — 35.4mm vs 34mm case width.
Which fits a smaller wrist better, the Apple Watch SE 3 GPS + Cellular 40mm or the Garmin Lily 2?
The Apple Watch SE 3 GPS + Cellular 40mm suits wrists around 42–57mm wide, and the Garmin Lily 2 around 37–51mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Apple Watch SE 3 GPS + Cellular 40mm and Garmin Lily 2 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.