Xiaomi Redmi Watch 5 Active vs Watch S4 41mm
Size, specs & wrist fit compared
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Which one fits you
On wrists narrower than about 52mm, the Watch S4 41mm is the safer pick — it stays proportionate down to roughly 43mm, where the Redmi Watch 5 Active starts to hang over the edge. Above 52mm both sit cleanly, and the Redmi Watch 5 Active gives you more presence.
The Watch S4 41mm wears larger than the Redmi Watch 5 Active (41.2mm vs 40.4mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Watch S4 41mm is the slimmer of the two (9.5mm vs 11.4mm), so it slides under a cuff more easily.
On the wrist the Watch S4 41mm feels lighter (32g vs 42.2g, case only).
Among the 509 40mm watches we hold thickness for, the Redmi Watch 5 Active is thicker than 74% — it will sit high even though the case width reads modest.
Among the 370 41mm watches we hold thickness for, the Watch S4 41mm is thinner than 98%, so it wears flatter than its width suggests.
The Watch S4 41mm is 0.8mm wider, 7.9mm shorter, 1.9mm thinner and 10.2g lighter than the Redmi Watch 5 Active.
Redmi Watch 5 Active
Watch S4 41mm
Switch or add watches
Xiaomi
Redmi Watch 5 Active
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 5 Active
Case 49.1mm · Lug-to-lug 49.1mm · Thickness 11.4mm · 42g
Sweet Spot
49.1mm on a 55mm wrist
Across the wrist it works — 2.9mm 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 49.1mm.
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 wrist2.9mm spare each side
Fills the wrist without reaching the edge.
- Off the wrist11.4mm off the skin
Normal sports-watch height for a wrist this size. (11.4mm case, back against the skin)
- How it seats~7.4mm under the rim
Wide enough that the edge of the case back lifts clear of the skin.
- Weight on the wrist42g
Light enough to forget you have it on. (0.8g 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 5 Active40.4mm × 49.1mm · 11.4mm thick
- Xiaomi Watch S4 41mm41.2mm · 9.5mm thick
3D preview
Redmi Watch 5 Active 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 5 Active lasts 2.3× as long as the Watch S4 41mm (18 days against 8 days).
Redmi Watch 5 ActiveWatch S4 41mm
Smartwatch
18 days8 daysTraining
288 hours—
Specifications
The short version
11 key specs| Spec | XiaomiRedmi Watch 5 Active | XiaomiWatch S4 41mm |
|---|---|---|
| Case Width | 40.4mm | 41.2mm |
| Lug-to-Lug | 49.1mm | 41.2mm |
| Thickness | 11.4mm | 9.5mm |
| Weight | 42.2g | 32g |
| Shape | Rectangle | Circular |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | No | Yes |
| Display type | LCD, IPS | OLED/AMOLED |
| Screen size | 2 inches | 1.32 inches |
| Battery life | 18 days | 8 days |
| Released | 2024 | 2025 |
Every specification
114 specs| Spec | Xiaomi Redmi Watch 5 Active | Xiaomi Watch S4 41mm |
|---|---|---|
| Design | ||
| width | 40.4 | 41.2 |
| height | 49.1 | 41.2 |
| volume | 22.61 cm³ | 16.13 cm³ |
| weight | 42.2 g | 32 g |
| thickness | 11.4 | 9.5 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 320 x 385 px | 466 x 466 px |
| screen size | 2 inches | 1.32 inches |
| Display type | LCD, IPS | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 250 ppi | 320 ppi |
| width of band | 22 mm | — |
| water resistance | Water resistant | 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 |
| maximum operating temperature | 45 °C | — |
| Ingress Protection (IP) rating | IPX8 | — |
| has branded damage-resistant glass | No | No |
| lowest potential operating temperature | -10 °C | — |
| Battery | ||
| charge time | 2 hours | — |
| battery life | 18 days | 8 days |
| battery power | 470 mAh | 320 mAh |
| has wireless charging | No | No |
| has a removable battery | No | No |
| Has a solar power battery | No | No |
| has a rechargeable battery | Yes | Yes |
| battery life in training mode | 288 hours | — |
| Sensors | ||
| has GPS | No | Yes |
| has a compass | No | Yes |
| Has a barometer | No | Yes |
| has a gyroscope | Yes | Yes |
| Has a cadence sensor | Yes | No |
| 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 |
| Features | ||
| release date | 2024-08-27 | 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 |
| measures VO2 max | No | Yes |
| Has notifications | Yes | Yes |
| Has ECG technology | No | No |
| Locates your phone | Yes | Yes |
| has a front camera | Yes | No |
| has fall detection | No | Yes |
| has voice commands | Yes | Yes |
| Has vibrating alerts | Yes | Yes |
| 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 |
| has HRV tracking | — | Yes |
| internal storage | — | 32GB |
| Acquires GPS faster | — | Yes |
| number of microphones | — | 1 |
| shows readiness level | — | Yes |
| has fast/slow heart rate notifications | — | Yes |
| Connectivity | ||
| has NFC | No | Yes |
| supports Wi-Fi | No | No |
| supports Galileo | No | 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 |
| 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 | No | Yes |
| Tracks elevation | No | 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 |
| 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 5 Active
Sits best on wrists ~52–70mm wide (≈ 13.9–18.7cm 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 5 Active bigger than the Xiaomi Watch S4 41mm?
The Xiaomi Watch S4 41mm is bigger — 41.2mm vs 40.4mm case width.
Which fits a smaller wrist better, the Xiaomi Redmi Watch 5 Active or the Xiaomi Watch S4 41mm?
The Xiaomi Redmi Watch 5 Active suits wrists around 52–70mm 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 5 Active 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.