Amazfit Pop 3R vs Google Pixel Watch 4 45mm
Size, specs & wrist fit compared
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Which one fits you
Both need much the same wrist — roughly 47–65mm across the flat of the wrist. Neither will fit where the other won't, so decide on thickness, weight and features instead.
The Amazfit Pop 3R wears larger than the Google Pixel Watch 4 45mm (45.5mm vs 45mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Amazfit Pop 3R is the slimmer of the two (10.8mm 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 55.48g, case only).
The Amazfit Pop 3R is thinner than 97% of the 46mm watches we track and the Google Pixel Watch 4 45mm than 71% of the 45mm ones — so both wear flatter than their widths suggest.
The Amazfit Pop 3R is 0.5mm wider, 0.5mm longer, 1.5mm thinner and 18.8g heavier than the Google Pixel Watch 4 45mm. Both are circular.
Amazfit
Pop 3R
Pixel Watch 4 - 45mm
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Amazfit
Pop 3R
Pixel Watch 4 - 45mm
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 Pop 3R
Case 45.5mm · Lug-to-lug 45.5mm · Thickness 10.8mm · 55g
Balanced Fit
45.5mm 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 45.5mm, 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 wrist4.8mm spare each side
Comfortable, with visible skin either side.
- Off the wrist10.8mm off the skin
Normal sports-watch height for a wrist this size. (10.8mm case, back against the skin)
- How it seats~5.4mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist55g
Substantial without being a burden — the usual weight of a steel watch on a wrist this size. (1.0g per mm of wrist)
Google Pixel Watch 4 - 45mm
Case 45.0mm · Lug-to-lug 45.0mm · Thickness 12.3mm · 37g
Balanced Fit
45mm 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 45mm, 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 wrist5.0mm spare each side
Comfortable, with visible skin either side.
- Off the wrist12.3mm off the skin
Normal sports-watch height for a wrist this size. (12.3mm case, back against the skin)
- How it seats~5.2mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist37g
Light enough to forget you have it on. (0.7g 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 Pop 3R45.5mm · 10.8mm thick
- Google Pixel Watch 4 - 45mm45mm · 12.3mm thick
3D preview
Amazfit Pop 3R vs Google Pixel Watch 4 - 45mm 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 Amazfit Pop 3R lasts 7.5× as long as the Google Pixel Watch 4 45mm (12 days against 38.4 hours).
Amazfit Pop 3RGoogle Pixel Watch 4 45mm
Smartwatch
12 days1.6 daysBattery Saver
—72 hours
Specifications
The short version
10 key specs| Spec | AmazfitPop 3R | GooglePixel Watch 4 - 45mm |
|---|---|---|
| Case Width | 45.5mm | 45mm |
| Thickness | 10.8mm | 12.3mm |
| Weight | 55.48g | 36.7g |
| Shape | Circular | Circular |
| Water Resistance | Water resistant | 5 ATM |
| GPS | No | Yes |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Screen size | 1.43 inches | 1.4 inches |
| Battery life | 12 days | 1.6 days |
| Released | 2023 | 2025 |
Every specification
115 specs| Spec | Amazfit Pop 3R | Google Pixel Watch 4 - 45mm |
|---|---|---|
| Design | ||
| width | 45.5 | 45 |
| height | 45.5 | 45 |
| volume | 22.36 cm³ | 24.91 cm³ |
| weight | 55.48 g | 36.7 g |
| thickness | 10.8 | 12.3 |
| resolution | 466 x 466 px | 456 x 456 px |
| screen size | 1.43 inches | 1.4 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 460 ppi | 320 ppi |
| water resistance | Water resistant | Waterproof |
| Always-On Display | Yes | Yes |
| has a touch screen | Yes | Yes |
| is designed for kids | No | — |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | No |
| Ingress Protection (IP) rating | IP68 | IP68 |
| has branded damage-resistant glass | No | Yes |
| ATM rating | — | 5 ATM |
| Gorilla Glass version | — | Gorilla Glass 5 |
| waterproof depth rating | — | 50 m |
| Battery | ||
| charge time | 1.5 hours | 1.25 hours |
| battery life | 12 days | 1.6 days |
| has a removable battery | No | No |
| Has a solar power battery | No | No |
| has a rechargeable battery | Yes | Yes |
| battery power | — | 455 mAh |
| has wireless charging | — | No |
| battery life in power save mode | — | 72 hours |
| Sensors | ||
| has GPS | No | Yes |
| has a compass | No | Yes |
| Has a barometer | No | Yes |
| has a gyroscope | No | Yes |
| Has a cadence sensor | No | Yes |
| has an accelerometer | Yes | Yes |
| Monitors perspiration | No | No |
| Has a heart rate monitor | Yes | Yes |
| Has a temperature sensor | No | Yes |
| Monitors blood oxygenation levels | Yes | Yes |
| Features | ||
| release date | 2023-06-29 | 2025-08-20 |
| 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 notifications | Yes | Yes |
| Has ECG technology | No | Yes |
| Locates your phone | Yes | Yes |
| has fall detection | No | Yes |
| has voice commands | Yes | Yes |
| Acquires GPS faster | No | No |
| Has vibrating alerts | Yes | Yes |
| Can be used to answer calls | Yes | Yes |
| has irregular heart rate warnings | No | Yes |
| Has a built-in camera remote control function | No | Yes |
| RAM | — | 2GB |
| has HRV tracking | — | Yes |
| internal storage | — | 32GB |
| measures VO2 max | — | Yes |
| shows readiness level | — | Yes |
| measures resting heart rate | — | Yes |
| has fast/slow heart rate notifications | — | Yes |
| Connectivity | ||
| has NFC | No | Yes |
| supports ANT+ | No | — |
| supports Wi-Fi | No | Yes |
| supports Galileo | No | Yes |
| Bluetooth version | 5.2 | 6 |
| has a cellular module | No | Yes |
| Is compatible with iOS | Yes | No |
| Is compatible with Android | Yes | Yes |
| SIM cards | — | 1 eSIM |
| Wi-Fi version | — | Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax) |
| 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 |
| Compatible with external heart rate monitors | Yes | — |
| App & Software | ||
| Ad-free | Yes | Yes |
| Free app | Yes | Yes |
| Tracks BMI | Yes | — |
| Supports routes | Yes | Yes |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has exercise diary | 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 | No | Yes |
| Provides activity reports | Yes | Yes |
| Counts how many calories you've burned | Yes | Yes |
| Has coaching | — | Yes |
| Includes maps | — | Yes |
| Has live tracking | — | Yes |
| Predicts ovulation | — | Yes |
| Doesn’t require account | — | No |
| Displays fertile window notifications | — | Yes |
| 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
Amazfit Pop 3R
Sits best on wrists ~48–65mm wide (≈ 12.8–17.4cm circumference).
Google Pixel Watch 4 45mm
Sits best on wrists ~47–64mm wide (≈ 12.6–17.1cm circumference).
Frequently Asked Questions
Is the Amazfit Pop 3R bigger than the Google Pixel Watch 4 45mm?
The Amazfit Pop 3R is bigger — 45.5mm vs 45mm case width.
Which fits a smaller wrist better, the Amazfit Pop 3R or the Google Pixel Watch 4 45mm?
The Amazfit Pop 3R suits wrists around 48–65mm wide, and the Google Pixel Watch 4 45mm around 47–64mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Amazfit Pop 3R and Google Pixel Watch 4 45mm 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.