Polar · 2021
Grit X Pro Size, Dimensions & Wrist Fit
The Grit X Pro looks in proportion on wrists of 16.5 cm (6.5 in) and up round, and fills the wrist at 17.5–19.5 cm (lug-to-lug estimated at ≈54mm; Polar does not publish it).
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Does the Grit X Pro fit your wrist?
| Wrist round (mm left each side) | 47mm≈54mm lug to lug, est. |
|---|---|
| 14 cm / 5.5 in | Overhangs (4.4mm over) |
| 15 cm / 5.9 in | Overhangs (2.8mm over) |
| 16 cm / 6.3 in | Overhangs (1.2mm over) |
| 17 cm / 6.7 in | Bold (0.4mm) |
| 18 cm / 7.1 in | Sweet spot (2mm) |
| 19 cm / 7.5 in | Sweet spot (3.6mm) |
| 20 cm / 7.9 in | Balanced (5.3mm) |
The Grit X Pro in short
- Between 40 hours and 7 days per charge depending on the power mode — smartwatch at best, heavy use at worst.
- Water rated to 100 m.
- 53g on the wrist.
- 1.2 inches LCD display, always-on capable.
- Takes 22mm bands, so third-party straps fit without an adapter.
Compare with another watch
Size, fit and battery side by side, against any smartwatch we list.
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Grit X Pro battery life
Runtime by power mode
- Smartwatch7 days
- GPS43 hours
- Heavy use40 hours
Where it ranks among Polar watches
- Everyday use7 days#2 of 7
- Capacity346 mAh#2 of 7
Top three in the Polar range for everyday (smartwatch) use and battery capacity.
See all 7 Polar watches ranked by battery lifeSettings to change and the 24-hour idle test are on the battery check.
2D Dimension Schematics
- Polar Grit X Pro 47mm × ≈54mm (est.) · 13mm thick
3D preview
Polar Grit X Pro on a wrist
What size band does the Grit X Pro take?
Lug width
22mm
Alternatives to the Grit X Pro
Grit X Pro specifications
- Battery life
- 7 days
- Display
- 1.2 inches
- Resolution
- 240 x 240 px
- Water rating
- 10 ATM
- Strap
- 22 mm
Show all specificationsPolar's published specification, for reference · checked September 2026
Design
- width
- 47
- height
- 47
- volume
- 28.72 cm³
- weight
- 53 g
- thickness
- 13
- ATM rating
- 10 ATM
- resolution
- 240 x 240 px
- screen size
- 1.2 inches
- Display type
- LCD
- Has a display
- Yes
- pixel density
- 282 ppi
- width of band
- 22 mm
- water resistance
- Waterproof
- Always-On Display
- Yes
- has a touch screen
- Yes
- is designed for kids
- No
- waterproof depth rating
- 100 m
- Watch band is replaceable
- Yes
- Has sapphire glass display
- Yes
- maximum operating temperature
- 50 °C
- has branded damage-resistant glass
- No
- lowest potential operating temperature
- -20 °C
Battery
- battery life
- 7 days
- battery power
- 346 mAh
- has wireless charging
- Yes
- has a removable battery
- No
- battery life with GPS on
- 43 hours
- Has a solar power battery
- No
- has a rechargeable battery
- Yes
- battery life in training mode
- 40 hours
- battery life in power save mode
- 140 hours
Sensors
- has GPS
- Yes
- has a compass
- Yes
- Has a barometer
- Yes
- has a gyroscope
- Yes
- Has a cadence sensor
- Yes
- has an accelerometer
- Yes
- Monitors perspiration
- No
- Has a heart rate monitor
- Yes
- Has a temperature sensor
- Yes
- Monitors blood oxygenation levels
- No
Features
- release date
- 2021-10-12
- Has a stopwatch
- Yes
- Has smart alarm
- No
- warranty period
- 2 years
- Has call control
- Yes
- Has silent alarm
- Yes
- has HRV tracking
- Yes
- measures VO2 max
- Yes
- Has notifications
- Yes
- Has ECG technology
- Yes
- Locates your phone
- No
- has voice commands
- No
- Acquires GPS faster
- Yes
- Has vibrating alerts
- Yes
- shows readiness level
- Yes
- Can be used to answer calls
- No
- measures resting heart rate
- Yes
- has irregular heart rate warnings
- No
- has fast/slow heart rate notifications
- Yes
- Has a built-in camera remote control function
- No
Connectivity
- has NFC
- Yes
- supports ANT+
- No
- supports Wi-Fi
- No
- supports Galileo
- Yes
- has a cellular module
- No
- Is compatible with iOS
- Yes
- Is compatible with Android
- Yes
Miscellaneous
- Has auto pause
- Yes
- Available on PC
- Yes
- Has trackback mode
- Yes
- Is compatible with Windows
- No
- Is compatible with Mac OS X
- No
- has an external memory slot
- No
- has a battery level indicator
- Yes
- Provides the sunrise/sunset time
- Yes
- has a socket for a 3.5 mm audio jack
- No
- Compatible with external heart rate monitors
- Yes
App & Software
- Ad-free
- Yes
- Free app
- Yes
- Has coaching
- Yes
- Supports routes
- Yes
- Has achievements
- Yes
- Has goal setting
- Yes
- Has exercise diary
- Yes
- Predicts ovulation
- No
- Has weight tracking
- Yes
- Predicts start date
- No
- Tracks water intake
- Yes
- number of exercises
- 130 (Polar Flow)
- Has inactivity alerts
- Yes
- Has period notifications
- No
- Has temperature tracking
- Yes
- Provides activity reports
- Yes
- Displays fertile window notifications
- No
- Counts how many calories you've burned
- Yes
Activity tracking
- Measures pace
- Yes
- Tracks distance
- Yes
- Tracks elevation
- Yes
- Tracks your sleep
- Yes
- Tracks steps taken
- Yes
- Designed for diving
- No
- Has a route tracker
- Yes
- Has exercise tagging
- Yes
- Has multi-sport mode
- Yes
- Tracks calorie intake
- Yes
- Provides sleep reports
- Yes
- Detects activities automatically
- Yes
- Has a stroke counter for swimming
- Yes
