Xiaomi Redmi Watch 4 vs Watch S4 41mm
Size, specs & wrist fit compared
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Which one fits you
On wrists narrower than about 50mm, the Watch S4 41mm is the safer pick — it stays proportionate down to roughly 43mm, where the Redmi Watch 4 starts to hang over the edge. Above 50mm both sit cleanly, and the Redmi Watch 4 gives you more presence.
The Redmi Watch 4 and Watch S4 41mm share a near-identical 41.1mm case, so wrist presence comes down to thickness, lug-to-lug and weight.
The Watch S4 41mm is the slimmer of the two (9.5mm vs 10.5mm), so it slides under a cuff more easily.
The Redmi Watch 4 is thinner than 86% of the 373 41mm watches we hold thickness for, the Watch S4 41mm than 98% — so both wear flatter than their widths suggest.
The Watch S4 41mm is 0.1mm wider, 6.4mm shorter, 1mm thinner and 0.5g heavier than the Redmi Watch 4.
Redmi Watch 4
Watch S4 41mm
Switch or add watches
Xiaomi
Redmi Watch 4
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.
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.
Xiaomi Redmi Watch 4
Case 47.6mm · Lug-to-lug 47.6mm · Thickness 10.5mm · 32g
Sweet Spot
47.6mm on a 55mm wrist
Across the wrist it works — 3.7mm spare each side — but wide enough that the edge of the case back lifts clear of the skin.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 47.6mm.
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 wrist3.7mm spare each side
Fills the wrist without reaching the edge.
- Off the wrist10.5mm off the skin
Normal sports-watch height for a wrist this size. (10.5mm case, back against the skin)
- How it seats~6.4mm under the rim
Wide enough that the edge of the case back lifts clear of the skin.
- Weight on the wrist32g
Light enough to forget you have it on. (0.6g 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.
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 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.
- Xiaomi Redmi Watch 441.1mm × 47.6mm · 10.5mm thick
- Xiaomi Watch S4 41mm41.2mm · 9.5mm thick
3D preview
Redmi Watch 4 vs 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 Redmi Watch 4 lasts 2.5× as long as the Watch S4 41mm (20 days against 8 days).
Redmi Watch 4Watch S4 41mm
Battery Saver
720 hours—Smartwatch
20 days8 days
Specifications
The short version
11 key specs| Spec | XiaomiRedmi Watch 4 | XiaomiWatch S4 41mm |
|---|---|---|
| Case Width | 41.1mm | 41.2mm |
| Lug-to-Lug | 47.58mm | 41.2mm |
| Thickness | 10.5mm | 9.5mm |
| Weight | 31.5g | 32g |
| Shape | Rectangle | Circular |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | Yes | Yes |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Screen size | 1.97 inches | 1.32 inches |
| Battery life | 20 days | 8 days |
| Released | 2023 | 2025 |
Every specification
113 specs| Spec | Xiaomi Redmi Watch 4 | Xiaomi Watch S4 41mm |
|---|---|---|
| Design | ||
| width | 41.1 | 41.2 |
| height | 47.58 | 41.2 |
| volume | 20.53 cm³ | 16.13 cm³ |
| weight | 31.5 g | 32 g |
| thickness | 10.5 | 9.5 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 390 x 450 px | 466 x 466 px |
| screen size | 1.97 inches | 1.32 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 302 ppi | 320 ppi |
| water resistance | Waterproof | Waterproof |
| Always-On Display | Yes | Yes |
| has a touch screen | Yes | Yes |
| is designed for kids | No | No |
| waterproof depth rating | 50 m | — |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | Yes |
| Ingress Protection (IP) rating | IP68 | — |
| has branded damage-resistant glass | No | No |
| Battery | ||
| charge time | 1.4 hours | — |
| battery life | 20 days | 8 days |
| battery power | 470 mAh | 320 mAh |
| has wireless charging | Yes | No |
| has a removable battery | No | No |
| Has a solar power battery | No | No |
| has a rechargeable battery | Yes | Yes |
| battery life in power save mode | 720 hours | — |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | No | Yes |
| has a gyroscope | Yes | Yes |
| has an accelerometer | Yes | Yes |
| Monitors perspiration | No | No |
| Has a heart rate monitor | Yes | Yes |
| Has a temperature sensor | No | Yes |
| Monitors blood oxygenation levels | Yes | Yes |
| Has a cadence sensor | — | No |
| Features | ||
| release date | 2023-11-29 | 2025-06-26 |
| Has a stopwatch | Yes | Yes |
| Has smart alarm | No | No |
| warranty period | 1 years | 1 years |
| Has call control | Yes | Yes |
| Has silent alarm | Yes | Yes |
| has HRV tracking | Yes | Yes |
| Has notifications | Yes | Yes |
| Has ECG technology | No | No |
| Locates your phone | Yes | Yes |
| has fall detection | No | Yes |
| has voice commands | No | Yes |
| Has vibrating alerts | Yes | Yes |
| number of microphones | 1 | 1 |
| Can be used to answer calls | Yes | Yes |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | No | No |
| Has a built-in camera remote control function | Yes | Yes |
| internal storage | — | 32GB |
| measures VO2 max | — | Yes |
| has a front camera | — | No |
| Acquires GPS faster | — | Yes |
| shows readiness level | — | Yes |
| has fast/slow heart rate notifications | — | Yes |
| Connectivity | ||
| has NFC | Yes | Yes |
| supports Wi-Fi | No | No |
| supports Galileo | Yes | Yes |
| Bluetooth version | 5.3 | 5.4 |
| has a cellular module | No | Yes |
| Is compatible with iOS | Yes | Yes |
| Is compatible with Android | Yes | Yes |
| SIM cards | — | 1 eSIM |
| supports ANT+ | — | No |
| Miscellaneous | ||
| Has passcode | No | Yes |
| Is compatible with Windows | No | No |
| Is compatible with Mac OS X | No | No |
| has an external memory slot | No | No |
| has a battery level indicator | Yes | Yes |
| has a socket for a 3.5 mm audio jack | No | No |
| Compatible with external heart rate monitors | Yes | — |
| App & Software | ||
| Free app | Yes | Yes |
| Has coaching | Yes | No |
| Supports routes | Yes | No |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has exercise diary | Yes | Yes |
| Predicts ovulation | Yes | Yes |
| Can be personalised | Yes | Yes |
| Has weight tracking | Yes | Yes |
| Predicts start date | Yes | Yes |
| Tracks water intake | Yes | Yes |
| number of exercises | 150 | — |
| Has inactivity alerts | Yes | Yes |
| Has period notifications | Yes | Yes |
| Has temperature tracking | No | Yes |
| Doesn’t require account | No | No |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | — |
| Counts how many calories you've burned | Yes | Yes |
| Ad-free | — | Yes |
| Includes maps | — | Yes |
| Activity tracking | ||
| Measures pace | Yes | Yes |
| Tracks distance | Yes | Yes |
| Tracks elevation | Yes | Yes |
| Designed for golf | No | — |
| Tracks your sleep | Yes | Yes |
| Tracks steps taken | Yes | Yes |
| Designed for diving | No | No |
| Has a route tracker | Yes | Yes |
| Has exercise tagging | Yes | Yes |
| Has multi-sport mode | Yes | — |
| Tracks calorie intake | Yes | Yes |
| Provides sleep reports | Yes | Yes |
| Detects activities automatically | Yes | Yes |
| Has a stroke counter for swimming | Yes | Yes |
Wrist Fit
Xiaomi Redmi Watch 4
Sits best on wrists ~50–68mm wide (≈ 13.4–18.2cm circumference).
Xiaomi Watch S4 41mm
Sits best on wrists ~43–59mm wide (≈ 11.5–15.8cm circumference).
Frequently Asked Questions
Is the Xiaomi Redmi Watch 4 bigger than the Xiaomi Watch S4 41mm?
The Xiaomi Watch S4 41mm is bigger — 41.2mm vs 41.1mm case width.
Which fits a smaller wrist better, the Xiaomi Redmi Watch 4 or the Xiaomi Watch S4 41mm?
The Xiaomi Redmi Watch 4 suits wrists around 50–68mm 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 Xiaomi Redmi Watch 4 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.