Xiaomi · 2024
Watch S4Size, Dimensions & Wrist Fit
The Xiaomi Watch S4 sits best on flat wrist widths of about 50–68mm (≈ 13.4–18.2cm wrist circumference). Adjust the slider below to check your wrist.
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The Watch S4 in short
The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.
- Rated for 15 days of use per charge.
- Water rated to 50 m.
- 44.5g on the wrist. Lighter than 86% of the 47mm watches we have weights for.
- 1.43 inches OLED/AMOLED display, always-on capable.
- Carries on-board maps rather than breadcrumb navigation only.
Does the Watch S4 fit your wrist?
Drag the slider to your wrist width and see the Watch S4 overlaid at true scale. Lug-to-lug — not case diameter — decides whether a watch overhangs your wrist.
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 Watch S4
Case 47.3mm · Lug-to-lug 47.3mm · Thickness 12.0mm · 45g
Sweet Spot
47.3mm on a 55mm wrist
Across the wrist it works — 3.9mm 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 47.3mm.
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 wrist3.9mm spare each side
Fills the wrist without reaching the edge.
- Off the wrist12.0mm off the skin
Normal sports-watch height for a wrist this size. (12.0mm case, back against the skin)
- How it seats~6.3mm under the rim
Wide enough that the edge of the case back lifts clear of the skin.
- Weight on the wrist45g
Light enough to forget you have it on. (0.8g per mm of wrist)
Happy with the fit? Check current availability for the Watch S4.
Check offer2D Dimension Schematics
The Watch S4 drawn to scale — from above, and in profile against the wrist.
- Xiaomi Watch S447.3mm · 12mm thick
3D preview
Xiaomi Watch S4 on a wrist
On an arm sized to your own wrist — the view a product photo never gives you.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
Which Watch S4 size fits you?
This model comes in 2 versions. Set your measurement and each one reports its own verdict — tap any size to open its page.
Which of these fits your wrist?
Roughly a 14.7cm wrist circumference — the measurement a tape gives you. Compared against lug-to-lug where we have it, case width otherwise.
All 2 Watch S4 variants fit this wrist. The 47.3mm gives you the most presence without overhanging; the smallest is the discreet end of the range.
- Width
- 41.2mm
- Thick
- 9.5mm
- Weight
- 32g
6.9mm clear a side
View this size- Width
- 47.3mm
- Thick
- 12mm
- Weight
- 44.5g
3.9mm clear a side
Watch S4 battery life
The runtime the manufacturer publishes for everyday use.
- Smartwatch15 days
How the Watch S4 ranks on battery
Against the 32 Xiaomi watches in our database, ranked on each figure Xiaomi publishes.
- Everyday use15 days#6 of 32
- Capacity486 mAh#11 of 32
Watch S4 specifications
The figures that decide a purchase, followed by every line Xiaomi publishes.
- Battery life
- 15 days
- Display
- 1.43 inches
- Resolution
- 466 x 466 px
- Water rating
- 5 ATM
- Storage
- 32GB
Full specification sheet
105 published lines across 8 groups, unedited
Design
- width
- 47.3
- height
- 47.3
- volume
- 26.85 cm³
- weight
- 44.5 g
- thickness
- 12
- ATM rating
- 5 ATM
- resolution
- 466 x 466 px
- screen size
- 1.43 inches
- Display type
- OLED/AMOLED
- Has a display
- pixel density
- 326 ppi
- water resistance
- Waterproof
- Always-On Display
- has a touch screen
- is designed for kids
- waterproof depth rating
- 50 m
- Watch band is replaceable
- Has sapphire glass display
- has branded damage-resistant glass
Battery
- battery life
- 15 days
- battery power
- 486 mAh
- has wireless charging
- has a removable battery
- Has a solar power battery
- has a rechargeable battery
Sensors
- has GPS
- has a compass
- Has a barometer
- has a gyroscope
- Has a cadence sensor
- has an accelerometer
- Monitors perspiration
- Has a heart rate monitor
- Has a temperature sensor
- Monitors blood oxygenation levels
Features
- release date
- 2024-10-29
- Has a stopwatch
- Has smart alarm
- warranty period
- 1 years
- Has call control
- Has silent alarm
- has HRV tracking
- internal storage
- 32GB
- measures VO2 max
- Has notifications
- Has ECG technology
- Locates your phone
- has a front camera
- has fall detection
- has voice commands
- Acquires GPS faster
- Has vibrating alerts
- number of microphones
- 2
- shows readiness level
- Can be used to answer calls
- measures resting heart rate
- has irregular heart rate warnings
- has fast/slow heart rate notifications
- Has a built-in camera remote control function
Connectivity
- has NFC
- SIM cards
- 1 eSIM
- supports ANT+
- supports Wi-Fi
- supports Galileo
- Bluetooth version
- 5.3
- has a cellular module
- Is compatible with iOS
- Is compatible with Android
Miscellaneous
- Has passcode
- Is compatible with Windows
- Is compatible with Mac OS X
- has an external memory slot
- has a battery level indicator
- has a socket for a 3.5 mm audio jack
App & Software
- Ad-free
- Free app
- Has coaching
- Includes maps
- Supports routes
- Has achievements
- Has goal setting
- Has exercise diary
- Predicts ovulation
- Can be personalised
- Has weight tracking
- Predicts start date
- Tracks water intake
- Has inactivity alerts
- Has period notifications
- Has temperature tracking
- Doesn’t require account
- Provides activity reports
- Counts how many calories you've burned
Activity tracking
- Measures pace
- Tracks distance
- Tracks elevation
- Tracks your sleep
- Tracks steps taken
- Designed for diving
- Has a route tracker
- Has exercise tagging
- Tracks calorie intake
- Provides sleep reports
- Detects activities automatically
- Has a stroke counter for swimming
Compare the Watch S4 head to head
How each one differs in the three measurements you can feel on the wrist. Figures are relative to the Watch S4.
Xiaomi
Watch 5
- Width
- -0.3mm
- Thick
- +0.3mm
- Weight
- +11.5g
Apple
Watch Ultra 3
- Width
- -3.3mm
- Thick
- same mm
- Weight
- +17.3g
Pixel Watch 4 - 45mm
- Width
- -2.3mm
- Thick
- +0.3mm
- Weight
- -7.8g
Amazfit
Balance 2
- Width
- +0.1mm
- Thick
- +0.3mm
- Weight
- -1.5g
Garmin
Forerunner® 570 - 47mm
- Width
- -0.3mm
- Thick
- +0.9mm
- Weight
- +5.5g
Xiaomi
Watch S4 Sport
- Width
- -0.4mm
- Thick
- +0.6mm
- Weight
- +4.5g
Samsung
Galaxy Watch Ultra
- Width
- +0.1mm
- Thick
- +0.1mm
- Weight
- +16g
Amazfit
Active Edge
- Width
- -0.7mm
- Thick
- same mm
- Weight
- -10.5g
Xiaomi
Watch S3
- Width
- -0.3mm
- Thick
- same mm
- Weight
- -0.5g
Xiaomi
Watch S3 eSIM
- Width
- -0.3mm
- Thick
- same mm
- Weight
- -0.5g
Huawei
Watch 4 Pro
- Width
- +0.3mm
- Thick
- +0.9mm
- Weight
- +20.5g
Garmin
Forerunner® 965
- Width
- -0.1mm
- Thick
- +1.2mm
- Weight
- +8.5g
Alternatives to the Watch S4
Watches that cover a similar amount of wrist, with the measurements that separate them.
Xiaomi
Watch 5
- Width
- 47mm
- Thick
- 12.3mm
- Weight
- 56g
Xiaomi
Watch S3 eSIM
- Width
- 47mm
- Thick
- 12mm
- Weight
- 44g
Xiaomi
Watch S3
- Width
- 47mm
- Thick
- 12mm
- Weight
- 44g
Xiaomi
Watch S4 Sport
- Width
- 46.9mm
- Thick
- 12.6mm
- Weight
- 49g
Xiaomi
Watch S1 Active
- Width
- 46.5mm
- Thick
- 11mm
- Weight
- 36g
Xiaomi
Watch S1
- Width
- 46.5mm
- Thick
- 11mm
- Weight
- 53g
Watch S4 — Frequently Asked Questions
Will the Xiaomi Watch S4 fit my wrist?
The Xiaomi Watch S4 looks balanced on flat wrist widths of roughly 50–68mm (about 13.4–18.2cm circumference). Drag the slider above to check it against your own measurement.
How long does the Xiaomi Watch S4 battery last?
Xiaomi rates it at 15 days per charge in everyday use.
How does the Xiaomi Watch S4 battery compare with other Xiaomi watches?
At 15 days in everyday use it ranks #6 of the 32 Xiaomi watches in our database — the top 19% of the range. The full ranking, including GPS and power-saving figures, is on our Xiaomi battery life comparison.
Is the Xiaomi Watch S4 thick for a 47mm watch?
At 12mm, thinner than 92% of 47mm watches, so it slides under a cuff more easily than most of its size. Thickness, not case width, is what decides whether a watch catches on a shirt cuff.
Should I get the 41.2mm or 47.3mm Watch S4?
The Watch S4 comes in 2 case sizes — 41.2mm, 47.3mm. Which one suits you depends on the flat width of your wrist rather than preference: the larger sizes need a wider wrist to sit inside the edge. Set your measurement in the size picker above and each variant reports its clearance in millimetres.
What other watches are the same size as the Xiaomi Watch S4?
Garmin Fenix 9 47mm, Oppo Watch X3, CMF Watch 3 Pro, Amazfit Balance 2 all sit within half a millimetre of the Xiaomi Watch S4's 47.3mm case, so they cover the same amount of wrist.
