Withings · 2019
Steel HR Sport 40mm Size, Dimensions & Wrist Fit
The Steel HR Sport 40mm looks in proportion on wrists of 14–20 cm (5.5–7.9 in) round, and fills the wrist at 15–16.5 cm (lug-to-lug estimated at ≈45.5mm; Withings does not publish it).
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Does the Steel HR Sport 40mm fit your wrist?
The 36mm suits wrists of about 13–18.5 cm round; the 40mm, 14–20 cm. Both work from 14 to 18.5 cm, where it is a choice between more skin either side (the 36mm) and a case that fills the wrist (the 40mm). Under 14 cm only the 36mm's lugs stay on the wrist; over 18.5 cm the 36mm starts to look small.
| Wrist round (mm left each side) | 36mm≈41.5mm lug to lug, est. | 40mm≈45.5mm lug to lug, est. |
|---|---|---|
| 14 cm / 5.5 in | Sweet spot (1.8mm) | Overhangs (0.2mm over) |
| 15 cm / 5.9 in | Sweet spot (3.4mm) | Sweet spot (1.4mm) |
| 16 cm / 6.3 in | Balanced (5.1mm) | Sweet spot (3.1mm) |
| 17 cm / 6.7 in | Balanced (6.7mm) | Balanced (4.7mm) |
| 18 cm / 7.1 in | Balanced (8.3mm) | Balanced (6.3mm) |
| 19 cm / 7.5 in | Understated (9.9mm) | Balanced (7.9mm) |
| 20 cm / 7.9 in | Understated (11.5mm) | Balanced (9.5mm) |
Which Steel HR Sport size fits you?
36.3mm · 13mm thick · 39g
View this size39.5mm · 13mm thick · 49g
The Steel HR Sport 40mm in short
- The 36mm version is 3.2mm narrower and 10g lighter.
- Rated for 25 days of use per charge.
- Water rated to 50 m.
- 49g on the wrist.
- LCD display.
Compare with another watch
Size, fit and battery side by side, against any smartwatch we list.
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Steel HR Sport 40mm battery life
Published runtime
- Battery life25 days
Where it ranks among Withings watches
- Everyday use25 days#7 of 7
Settings to change and the 24-hour idle test are on the battery check.
2D Dimension Schematics
- Withings Steel HR Sport 40mm 39.5mm × ≈45.5mm (est.) · 13mm thick
3D preview
Withings Steel HR Sport 40mm on a wrist
What size band does the Steel HR Sport 40mm take?
Lug width
20mm
Alternatives to the Steel HR Sport 40mm
38mm · 13.2mm thick · 34.6g38mmWithings
ScanWatch 2 38mm
42mm · 13.7mm thick · 52.6g42mmWithings
ScanWatch 2 42mm
36.3mm · 13mm thick · 39g36.3mmWithings
Steel HR 36mm
43mm · 13.2mm thick · 72g43mmWithings
ScanWatch Horizon
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39.5mm39.5mmOmega
Seamaster Planet Ocean 600M Co-Axial 39.5 Master Chronometer Stainless Steel / Blue / Bracelet
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39.5mm · 11.76mm thick39.5mmOmega
Seamaster Master Co-Axial 39.5 Omega Boutique Edition Stainless Steel / Red / Alligator
Steel HR Sport 40mm specifications
- Battery life
- 25 days
- Display
- LCD
- Water rating
- Waterproof
- Strap
- 20 mm
Show all specificationsWithings's published specification, for reference · checked September 2026
Design
- width
- 39.5
- height
- 39.5
- volume
- 20.28 cm³
- weight
- 49 g
- thickness
- 13
- Display type
- LCD
- Has a display
- Yes
- width of band
- 20 mm
- water resistance
- Waterproof
- has a touch screen
- No
- waterproof depth rating
- 50 m
- Watch band is replaceable
- Yes
- Has sapphire glass display
- No
- maximum operating temperature
- 45 °C
- has branded damage-resistant glass
- No
- lowest potential operating temperature
- -10 °C
Battery
- battery life
- 25 days
- has wireless charging
- No
- has a removable battery
- No
- Has a solar power battery
- No
- has a rechargeable battery
- Yes
Sensors
- has GPS
- No
- has a compass
- No
- Has a barometer
- No
- has a gyroscope
- No
- Has a cadence sensor
- No
- has an accelerometer
- Yes
- Monitors perspiration
- No
- Has a heart rate monitor
- Yes
- Has a temperature sensor
- No
- Monitors blood oxygenation levels
- Yes
Features
- release date
- 2019-02-11
- Has a stopwatch
- Yes
- Has smart alarm
- Yes
- warranty period
- 2 years
- Has call control
- No
- Has silent alarm
- Yes
- Has notifications
- Yes
- Locates your phone
- No
- has voice commands
- Yes
- Acquires GPS faster
- No
- Has vibrating alerts
- Yes
- Can be used to answer calls
- No
- Has a built-in camera remote control function
- No
Connectivity
- has NFC
- No
- supports ANT+
- No
- supports Wi-Fi
- No
- has a cellular module
- No
- Is compatible with iOS
- Yes
- Is compatible with Android
- Yes
Miscellaneous
- Is compatible with Windows
- No
- Is compatible with Mac OS X
- No
- has an external memory slot
- No
- Compatible with smart scales
- Yes
- has a battery level indicator
- Yes
- has a socket for a 3.5 mm audio jack
- No
App & Software
- Ad-free
- Yes
- Free app
- Yes
- Tracks BMI
- Yes
- Has achievements
- Yes
- Has goal setting
- Yes
- Has exercise diary
- Yes
- Has weight tracking
- Yes
- Tracks water intake
- No
- Has inactivity alerts
- No
- Provides activity reports
- Yes
- Counts how many calories you've burned
- Yes
Activity tracking
- Measures pace
- Yes
- Tracks distance
- Yes
- Tracks elevation
- Yes
- Designed for golf
- No
- Tracks your sleep
- Yes
- Tracks steps taken
- Yes
- Designed for diving
- No
- Has a route tracker
- No
- Has exercise tagging
- Yes
- Has multi-sport mode
- Yes
- Tracks calorie intake
- No
- Provides sleep reports
- Yes
- Detects activities automatically
- Yes
- Has a stroke counter for swimming
- No
