Amazfit Bip 6 vs Xiaomi Redmi Watch 4
Size, specs & wrist fit compared
As an Amazon Associate, WatchFitTool earns from qualifying purchases.
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 Xiaomi Redmi Watch 4 wears larger than the Amazfit Bip 6 (41.1mm vs 40.2mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
On the wrist the Amazfit Bip 6 feels lighter (27.9g vs 31.5g, case only).
The Amazfit Bip 6 is middle-of-the-pack for thickness among the 530 40mm watches in the database.
Among the 373 41mm watches we hold thickness for, the Xiaomi Redmi Watch 4 is thinner than 86%, so it wears flatter than its width suggests.
The Xiaomi Redmi Watch 4 is 0.9mm wider, 1.3mm longer, 0.1mm thicker and 3.6g heavier than the Amazfit Bip 6. Both are rectangle.
Amazfit
Bip 6
Xiaomi
Redmi Watch 4
Switch or add watches
Amazfit
Bip 6
Xiaomi
Redmi Watch 4
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.
Amazfit Bip 6
Case 46.3mm · Lug-to-lug 46.3mm · Thickness 10.4mm · 28g
Balanced Fit
46.3mm 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 46.3mm, 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 wrist4.4mm spare each side
Comfortable, with visible skin either side.
- Off the wrist10.4mm off the skin
Normal sports-watch height for a wrist this size. (10.4mm case, back against the skin)
- How it seats~5.8mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist28g
Light enough to forget you have it on. (0.5g per mm of wrist)
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)
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
- Amazfit Bip 640.2mm × 46.3mm · 10.4mm thick
- Xiaomi Redmi Watch 441.1mm × 47.6mm · 10.5mm thick
3D preview
Amazfit Bip 6 vs Xiaomi Redmi Watch 4 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 Xiaomi Redmi Watch 4 lasts 1.4× as long as the Amazfit Bip 6 (20 days against 14 days).
Amazfit Bip 6Xiaomi Redmi Watch 4
Battery Saver
624 hours720 hoursSmartwatch
14 days20 daysGPS
32 hours—Training
14 hours—
Specifications
The short version
11 key specs| Spec | AmazfitBip 6 | XiaomiRedmi Watch 4 |
|---|---|---|
| Case Width | 40.2mm | 41.1mm |
| Lug-to-Lug | 46.3mm | 47.58mm |
| Thickness | 10.45mm | 10.5mm |
| Weight | 27.9g | 31.5g |
| Shape | Rectangle | Rectangle |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | Yes | Yes |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Screen size | 1.97 inches | 1.97 inches |
| Battery life | 14 days | 20 days |
| Released | 2025 | 2023 |
Every specification
119 specs| Spec | Amazfit Bip 6 | Xiaomi Redmi Watch 4 |
|---|---|---|
| Design | ||
| width | 40.2 | 41.1 |
| height | 46.3 | 47.58 |
| volume | 19.45 cm³ | 20.53 cm³ |
| weight | 27.9 g | 31.5 g |
| thickness | 10.45 | 10.5 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 390 x 450 px | 390 x 450 px |
| screen size | 1.97 inches | 1.97 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 302 ppi | 302 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 | 50 m |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | No |
| Ingress Protection (IP) rating | IP68 | IP68 |
| has branded damage-resistant glass | No | No |
| Battery | ||
| charge time | 2 hours | 1.4 hours |
| battery life | 14 days | 20 days |
| battery power | 340 mAh | 470 mAh |
| has wireless charging | No | Yes |
| has a removable battery | No | No |
| battery life with GPS on | 32 hours | — |
| Has a solar power battery | No | No |
| has a rechargeable battery | Yes | Yes |
| battery life in training mode | 14 hours | — |
| battery life in power save mode | 624 hours | 720 hours |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | No | No |
| has a gyroscope | Yes | Yes |
| Has a cadence sensor | 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 |
| Features | ||
| release date | 2025-04-02 | 2023-11-29 |
| 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 |
| internal storage | 0.5GB | — |
| measures VO2 max | Yes | — |
| Has notifications | Yes | Yes |
| Has ECG technology | No | No |
| Locates your phone | Yes | Yes |
| has a front camera | No | — |
| has fall detection | No | No |
| has voice commands | Yes | No |
| Acquires GPS faster | No | — |
| Has vibrating alerts | Yes | Yes |
| number of microphones | 1 | 1 |
| shows readiness level | Yes | — |
| Can be used to answer calls | Yes | Yes |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | Yes | No |
| has fast/slow heart rate notifications | Yes | — |
| Has a built-in camera remote control function | Yes | Yes |
| Connectivity | ||
| has NFC | No | Yes |
| supports ANT+ | No | — |
| supports Wi-Fi | No | No |
| supports Galileo | Yes | Yes |
| Bluetooth version | 5.2 | 5.3 |
| has a cellular module | No | No |
| Is compatible with iOS | Yes | Yes |
| Is compatible with Android | Yes | Yes |
| Miscellaneous | ||
| Has passcode | Yes | No |
| Has auto pause | Yes | — |
| Is compatible with Windows | No | No |
| Is compatible with Mac OS X | No | No |
| has an external memory slot | No | No |
| Compatible with smart scales | Yes | — |
| 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 | ||
| Ad-free | Yes | — |
| Free app | Yes | Yes |
| Tracks BMI | Yes | — |
| Has coaching | Yes | Yes |
| Includes maps | Yes | — |
| Supports routes | Yes | Yes |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has live tracking | 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 | Yes | No |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | Yes |
| Counts how many calories you've burned | Yes | Yes |
| number of exercises | — | 150 |
| Doesn’t require account | — | No |
| Activity tracking | ||
| Measures pace | Yes | Yes |
| Tracks distance | Yes | Yes |
| Tracks elevation | Yes | Yes |
| 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 | No | 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
Amazfit Bip 6
Sits best on wrists ~49–66mm wide (≈ 13.1–17.6cm circumference).
Xiaomi Redmi Watch 4
Sits best on wrists ~50–68mm wide (≈ 13.4–18.2cm circumference).
Frequently Asked Questions
Is the Amazfit Bip 6 bigger than the Xiaomi Redmi Watch 4?
The Xiaomi Redmi Watch 4 is bigger — 41.1mm vs 40.2mm case width.
Which fits a smaller wrist better, the Amazfit Bip 6 or the Xiaomi Redmi Watch 4?
The Amazfit Bip 6 suits wrists around 49–66mm wide, and the Xiaomi Redmi Watch 4 around 50–68mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Amazfit Bip 6 and Xiaomi Redmi Watch 4 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.