Google Pixel Watch 4 - 45mm vs Xiaomi Watch 2 Pro
Size, specs & wrist fit compared
As an Amazon Associate, WatchFitTool earns from qualifying purchases.
Which one fits you
On wrists narrower than about 50mm, the Google Pixel Watch 4 - 45mm is the safer pick — it stays proportionate down to roughly 47mm, where the Xiaomi Watch 2 Pro starts to hang over the edge. Above 50mm both sit cleanly, and the Xiaomi Watch 2 Pro gives you more presence.
The Xiaomi Watch 2 Pro wears larger than the Google Pixel Watch 4 - 45mm (45.9mm vs 45mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Xiaomi Watch 2 Pro is the slimmer of the two (11.8mm vs 12.3mm), so it slides under a cuff more easily.
On the wrist the Google Pixel Watch 4 - 45mm feels lighter (36.7g vs 54.5g, case only).
The Google Pixel Watch 4 - 45mm is thinner than 70% of the 45mm watches we track and the Xiaomi Watch 2 Pro than 82% of the 46mm ones — so both wear flatter than their widths suggest.
The Xiaomi Watch 2 Pro is 0.9mm wider, 2.6mm longer, 0.5mm thinner and 17.8g heavier than the Google Pixel Watch 4 - 45mm. Both are circular.
Pixel Watch 4 - 45mm
Xiaomi
Watch 2 Pro
Switch or add watches
Pixel Watch 4 - 45mm
Xiaomi
Watch 2 Pro
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
- Google Pixel Watch 4 - 45mm45mm · 12.3mm thick
- Xiaomi Watch 2 Pro45.9mm × 47.6mm · 11.8mm thick
3D preview
Google Pixel Watch 4 - 45mm vs Xiaomi Watch 2 Pro 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 Watch 2 Pro lasts 1.4× as long as the Google Pixel Watch 4 - 45mm (2.2 days against 38.4 hours).
Google Pixel Watch 4 - 45mmXiaomi Watch 2 Pro
Battery Saver
72 hours—Smartwatch
1.6 days2.2 days
Specifications
The short version
11 key specs| Spec | GooglePixel Watch 4 - 45mm | XiaomiWatch 2 Pro |
|---|---|---|
| Case Width | 45mm | 45.9mm |
| Lug-to-Lug | 45mm | 47.6mm |
| Thickness | 12.3mm | 11.8mm |
| Weight | 36.7g | 54.5g |
| Shape | Circular | Circular |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | Yes | Yes |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Screen size | 1.4 inches | 1.43 inches |
| Battery life | 1.6 days | 2.2 days |
| Released | 2025 | 2023 |
Every specification
116 specs| Spec | Google Pixel Watch 4 - 45mm | Xiaomi Watch 2 Pro |
|---|---|---|
| Design | ||
| width | 45 | 45.9 |
| height | 45 | 47.6 |
| volume | 24.91 cm³ | 25.78 cm³ |
| weight | 36.7 g | 54.5 g |
| thickness | 12.3 | 11.8 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 456 x 456 px | 466 x 466 px |
| screen size | 1.4 inches | 1.43 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 320 ppi | 326 ppi |
| water resistance | Waterproof | Waterproof |
| Always-On Display | Yes | Yes |
| has a touch screen | Yes | Yes |
| Gorilla Glass version | Gorilla Glass 5 | — |
| waterproof depth rating | 50 m | 50 m |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | No |
| Ingress Protection (IP) rating | IP68 | — |
| has branded damage-resistant glass | Yes | No |
| is designed for kids | — | No |
| Battery | ||
| charge time | 1.25 hours | 0.75 hours |
| battery life | 1.6 days | 2.2 days |
| battery power | 455 mAh | 495 mAh |
| has wireless charging | No | 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 | 72 hours | — |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | Yes | Yes |
| has a gyroscope | Yes | Yes |
| Has a cadence sensor | Yes | No |
| has an accelerometer | Yes | Yes |
| Monitors perspiration | No | No |
| Has a heart rate monitor | Yes | Yes |
| Has a temperature sensor | Yes | Yes |
| Monitors blood oxygenation levels | Yes | Yes |
| Features | ||
| RAM | 2GB | 2GB |
| release date | 2025-08-20 | 2023-09-26 |
| 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 | — |
| internal storage | 32GB | 32GB |
| measures VO2 max | Yes | Yes |
| Has notifications | Yes | Yes |
| Has ECG technology | Yes | No |
| Locates your phone | Yes | Yes |
| has fall detection | Yes | Yes |
| has voice commands | Yes | Yes |
| Acquires GPS faster | No | — |
| Has vibrating alerts | Yes | Yes |
| 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 |
| number of microphones | — | 1 |
| Connectivity | ||
| has NFC | Yes | Yes |
| SIM cards | 1 eSIM | 1 eSIM |
| Wi-Fi version | Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax) | Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n) |
| supports Wi-Fi | Yes | Yes |
| supports Galileo | Yes | Yes |
| Bluetooth version | 6 | 5.2 |
| has a cellular module | Yes | Yes |
| Is compatible with iOS | No | No |
| Is compatible with Android | Yes | Yes |
| supports ANT+ | — | No |
| Miscellaneous | ||
| Has passcode | Yes | Yes |
| 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 |
| App & Software | ||
| Ad-free | Yes | Yes |
| Free app | Yes | Yes |
| Has coaching | Yes | No |
| Includes maps | Yes | Yes |
| Supports routes | Yes | No |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has live tracking | Yes | — |
| Has exercise diary | Yes | Yes |
| Predicts ovulation | Yes | — |
| Can be personalised | Yes | Yes |
| Has weight tracking | Yes | Yes |
| Predicts start date | Yes | — |
| Tracks water intake | Yes | Yes |
| Has inactivity alerts | Yes | Yes |
| Has period notifications | Yes | — |
| Has temperature tracking | Yes | Yes |
| Doesn’t require account | No | No |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | — |
| Counts how many calories you've burned | Yes | Yes |
| Tracks BMI | — | Yes |
| number of exercises | — | 161 |
| 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 | No |
| Tracks calorie intake | Yes | Yes |
| Provides sleep reports | Yes | Yes |
| Detects activities automatically | Yes | Yes |
| Has a stroke counter for swimming | No | No |
Wrist Fit
Google Pixel Watch 4 - 45mm
Sits best on wrists ~47–64mm wide (≈ 12.6–17.1cm circumference).
Xiaomi Watch 2 Pro
Sits best on wrists ~50–68mm wide (≈ 13.4–18.2cm circumference).
Frequently Asked Questions
Is the Google Pixel Watch 4 - 45mm bigger than the Xiaomi Watch 2 Pro?
The Xiaomi Watch 2 Pro is bigger — 45.9mm vs 45mm case width.
Which fits a smaller wrist better, the Google Pixel Watch 4 - 45mm or the Xiaomi Watch 2 Pro?
The Google Pixel Watch 4 - 45mm suits wrists around 47–64mm wide, and the Xiaomi Watch 2 Pro around 50–68mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Google Pixel Watch 4 - 45mm and Xiaomi Watch 2 Pro 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.