Xiaomi Redmi Watch 4 vs Redmi Watch 6
Size, specs & wrist fit compared
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Which one fits you
Both need much the same wrist — roughly 49–68mm across the flat of the wrist. Neither will fit where the other won't, so decide on thickness, weight and features instead.
The Redmi Watch 4 wears larger than the Redmi Watch 6 (41.1mm vs 40mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Redmi Watch 6 is the slimmer of the two (9.9mm vs 10.5mm), so it slides under a cuff more easily.
The Redmi Watch 4 is thinner than 86% of the 41mm watches we track and the Redmi Watch 6 than 67% of the 40mm ones — so both wear flatter than their widths suggest.
The Redmi Watch 4 is 1.1mm wider, 1.1mm longer, 0.6mm thicker and 0.5g heavier than the Redmi Watch 6. Both are rectangle.
Redmi Watch 4
Redmi Watch 6
Switch or add watches
Xiaomi
Redmi Watch 4
Xiaomi
Redmi Watch 6
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 Redmi Watch 6
Case 46.5mm · Lug-to-lug 46.5mm · Thickness 9.9mm · 31g
Balanced Fit
46.5mm 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 46.5mm, 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 wrist4.3mm spare each side
Comfortable, with visible skin either side.
- Off the wrist9.9mm off the skin
Normal sports-watch height for a wrist this size. (9.9mm case, back against the skin)
- How it seats~5.9mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist31g
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 Redmi Watch 640mm × 46.5mm · 9.9mm thick
3D preview
Redmi Watch 4 vs Redmi Watch 6 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 6 lasts 1.2× as long as the 4 (24 days against 20 days).
46
Battery Saver
720 hours—Smartwatch
20 days24 daysTraining
—288 hours
Specifications
The short version
11 key specs| Spec | XiaomiRedmi Watch 4 | XiaomiRedmi Watch 6 |
|---|---|---|
| Case Width | 41.1mm | 40mm |
| Lug-to-Lug | 47.58mm | 46.5mm |
| Thickness | 10.5mm | 9.9mm |
| Weight | 31.5g | 31g |
| Shape | Rectangle | Rectangle |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | Yes | Yes |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Screen size | 1.97 inches | 2.1 inches |
| Battery life | 20 days | 24 days |
| Released | 2023 | 2025 |
Every specification
109 specs| Spec | Xiaomi Redmi Watch 4 | Xiaomi Redmi Watch 6 |
|---|---|---|
| Design | ||
| width | 41.1 | 40 |
| height | 47.58 | 46.5 |
| volume | 20.53 cm³ | 18.41 cm³ |
| weight | 31.5 g | 31 g |
| thickness | 10.5 | 9.9 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 390 x 450 px | 432 x 514 px |
| screen size | 1.97 inches | 2.1 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 302 ppi | 324 ppi |
| water resistance | Waterproof | Water resistant |
| 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 | No |
| Ingress Protection (IP) rating | IP68 | — |
| has branded damage-resistant glass | No | No |
| width of band | — | 22 mm |
| maximum operating temperature | — | 45 °C |
| lowest potential operating temperature | — | -10 °C |
| Battery | ||
| charge time | 1.4 hours | 2 hours |
| battery life | 20 days | 24 days |
| battery power | 470 mAh | 550 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 | — |
| battery life in training mode | — | 288 hours |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | No | No |
| 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 | No |
| Monitors blood oxygenation levels | Yes | Yes |
| Has a cadence sensor | — | Yes |
| Features | ||
| release date | 2023-11-29 | 2025-10-23 |
| 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 | — |
| Has notifications | Yes | Yes |
| Has ECG technology | No | No |
| Locates your phone | Yes | Yes |
| has fall detection | No | No |
| has voice commands | No | Yes |
| Has vibrating alerts | Yes | Yes |
| number of microphones | 1 | 2 |
| 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 |
| measures VO2 max | — | No |
| has a front camera | — | Yes |
| Connectivity | ||
| has NFC | Yes | No |
| supports Wi-Fi | No | No |
| supports Galileo | Yes | Yes |
| Bluetooth version | 5.3 | 5.4 |
| has a cellular module | No | No |
| Is compatible with iOS | Yes | Yes |
| Is compatible with Android | Yes | Yes |
| Miscellaneous | ||
| Has passcode | No | No |
| 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 | Yes |
| App & Software | ||
| Free app | Yes | Yes |
| Has coaching | Yes | Yes |
| Supports routes | Yes | Yes |
| 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 | No |
| Doesn’t require account | No | No |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | Yes |
| Counts how many calories you've burned | Yes | Yes |
| Activity tracking | ||
| Measures pace | Yes | Yes |
| Tracks distance | Yes | No |
| Tracks elevation | Yes | No |
| Designed for golf | No | 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 Redmi Watch 6
Sits best on wrists ~49–66mm wide (≈ 13.1–17.6cm circumference).
Frequently Asked Questions
Is the Xiaomi Redmi Watch 4 bigger than the Xiaomi Redmi Watch 6?
The Xiaomi Redmi Watch 4 is bigger — 41.1mm vs 40mm case width.
Which fits a smaller wrist better, the Xiaomi Redmi Watch 4 or the Xiaomi Redmi Watch 6?
The Xiaomi Redmi Watch 4 suits wrists around 50–68mm wide, and the Xiaomi Redmi Watch 6 around 49–66mm. 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 Redmi Watch 6 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.