OnePlus · 2025
Watch 3 43mmSize, Dimensions & Wrist Fit
The OnePlus Watch 3 43mm sits best on flat wrist widths of about 45–62mm (≈ 12.0–16.6cm wrist circumference). Adjust the slider below to check your wrist.
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The Watch 3 43mm in short
The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.
- Between 36 hours and 168 hours per charge depending on the power mode — battery saver at best, training at worst.
- Water rated to 5 ATM.
- 37.8g on the wrist. Lighter than 71% of the 43mm watches we have weights for.
- 1.32 inches OLED/AMOLED display, always-on capable.
Does the Watch 3 43mm fit your wrist?
Drag the slider to your wrist width and see the Watch 3 43mm 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.
OnePlus Watch 3 43mm
Case 43.2mm · Lug-to-lug 43.2mm · Thickness 11.0mm · 38g
Balanced Fit
43.2mm 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 43.2mm, 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 wrist5.9mm spare each side
Comfortable, with visible skin either side.
- Off the wrist11.0mm off the skin
Normal sports-watch height for a wrist this size. (11.0mm case, back against the skin)
- How it seats~4.4mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist38g
Light enough to forget you have it on. (0.7g per mm of wrist)
Happy with the fit? Check current availability for the Watch 3 43mm.
Check offer2D Dimension Schematics
The Watch 3 43mm drawn to scale — from above, and in profile against the wrist.
- OnePlus Watch 3 43mm43.2mm · 11mm thick
3D preview
OnePlus Watch 3 43mm 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 3 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 3 variants fit this wrist. The 46.6mm gives you the most presence without overhanging; the smallest is the discreet end of the range.
- Width
- 43.2mm
- Thick
- 11mm
- Weight
- 37.8g
5.9mm clear a side
- Width
- 46.6mm
- Thick
- 11.8mm
- Weight
- 81g
3.7mm clear a side
View this sizeHow long the Watch 3 43mm lasts, by power mode
Runtime changes by a factor of 5 depending on what you leave switched on. Bars are scaled against the longest mode.
- Battery Saver168 hours
- Smartwatch2.5 days
- Training36 hours
How the Watch 3 43mm ranks on battery
Against the 7 OnePlus watches in our database, ranked on each figure OnePlus publishes.
- Everyday use2.5 days#7 of 7
- Capacity354 mAh#5 of 7
Watch 3 43mm specifications
The figures that decide a purchase, followed by every line OnePlus publishes.
- Battery life
- 2.5 days
- Display
- 1.32 inches
- Resolution
- 466 x 466 px
- Water rating
- 5 ATM
- Storage
- 32GB
- Charging
- 1 hours
Full specification sheet
94 published lines across 8 groups, unedited
Design
- width
- 43.2
- height
- 43.2
- volume
- 20.53 cm³
- weight
- 37.8 g
- thickness
- 11
- ATM rating
- 5 ATM
- resolution
- 466 x 466 px
- screen size
- 1.32 inches
- Display type
- OLED/AMOLED
- Has a display
- pixel density
- 352 ppi
- water resistance
- Waterproof
- Always-On Display
- has a touch screen
- is designed for kids
- Watch band is replaceable
- Has sapphire glass display
- Ingress Protection (IP) rating
- IP67
- has branded damage-resistant glass
Battery
- charge time
- 1 hours
- battery life
- 2.5 days
- battery power
- 354 mAh
- has wireless charging
- has a removable battery
- Has a solar power battery
- has a rechargeable battery
- battery life in training mode
- 36 hours
- battery life in power save mode
- 168 hours
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
- RAM
- 2GB
- release date
- 2025-07-08
- Has a stopwatch
- Has smart alarm
- Has call control
- Has silent alarm
- has HRV tracking
- internal storage
- 32GB
- measures VO2 max
- Has notifications
- Has ECG technology
- has a front camera
- has fall detection
- has voice commands
- Acquires GPS faster
- Has vibrating alerts
- 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
- Wi-Fi version
- Wi-Fi 4 (802.11n)
- supports ANT+
- supports Wi-Fi
- supports Galileo
- Bluetooth version
- 5.2
- has a cellular module
- Is compatible with iOS
- Is compatible with Android
Miscellaneous
- 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
- Has achievements
- Has goal setting
- Has weight tracking
- Tracks water intake
- Has inactivity alerts
- Provides activity reports
- Counts how many calories you've burned
Activity tracking
- Measures pace
- Tracks distance
- Tracks elevation
- Designed for golf
- Tracks your sleep
- Tracks steps taken
- Designed for diving
- Has a route tracker
- Has exercise tagging
- Has multi-sport mode
- Tracks calorie intake
- Provides sleep reports
- Detects activities automatically
Compare the Watch 3 43mm head to head
How each one differs in the three measurements you can feel on the wrist. Figures are relative to the Watch 3 43mm.
Garmin
Fenix 9 43mm
- Width
- -0.2mm
- Thick
- +2.8mm
- Weight
- +23.2g
OnePlus
Watch Lite
- Width
- +1.8mm
- Thick
- -2.1mm
- Weight
- -2.8g
Oppo
Watch X2 Mini
- Width
- same mm
- Thick
- same mm
- Weight
- same g
OnePlus
Watch 3
- Width
- +3.4mm
- Thick
- +0.8mm
- Weight
- +43.2g
OnePlus
Watch 2R
- Width
- +3.8mm
- Thick
- +1.1mm
- Weight
- +21.2g
Alternatives to the Watch 3 43mm
Watches that cover a similar amount of wrist, with the measurements that separate them.
OnePlus
Watch Lite
- Width
- 45mm
- Thick
- 8.9mm
- Weight
- 35g
OnePlus
Watch
- Width
- 46.4mm
- Thick
- 10.9mm
- Weight
- 45g
OnePlus
Watch 3
- Width
- 46.6mm
- Thick
- 11.8mm
- Weight
- 81g
OnePlus
Watch 2R
- Width
- 47mm
- Thick
- 12.1mm
- Weight
- 59g
OnePlus
Watch 2
- Width
- 47mm
- Thick
- 12.1mm
- Weight
- 80g
OnePlus
Nord Watch
- Width
- 37.2mm
- Thick
- 10.4mm
- Weight
- 52.4g
Watch 3 43mm — Frequently Asked Questions
Will the OnePlus Watch 3 43mm fit my wrist?
The OnePlus Watch 3 43mm looks balanced on flat wrist widths of roughly 45–62mm (about 12.0–16.6cm circumference). Drag the slider above to check it against your own measurement.
How long does the OnePlus Watch 3 43mm battery last?
Between 36 hours and 168 hours per charge, depending on the power mode. OnePlus rates Battery Saver at 168 hours and Training at 36 hours; the chart above lists all 3 modes.
How does the OnePlus Watch 3 43mm battery compare with other OnePlus watches?
At 2.5 days in everyday use it ranks #7 of the 7 OnePlus watches in our database — below the middle of the range. The full ranking, including GPS and power-saving figures, is on our OnePlus battery life comparison.
Is the OnePlus Watch 3 43mm thick for a 43mm watch?
At 11mm, thinner than 93% of 43mm 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 43.2mm or 46.6mm Watch 3?
The Watch 3 comes in 2 case sizes — 43.2mm, 46.6mm. 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 OnePlus Watch 3 43mm?
Garmin Fenix 9 43mm, Oppo Watch X2 Mini, Omega Speedmaster Moonphase Stainless Steel / Black Meteorite / Bracelet, Zenith Defy Extreme Diver Shadow / Bracelet all sit within half a millimetre of the OnePlus Watch 3 43mm's 43.2mm case, so they cover the same amount of wrist.
