Apple · 2017
Watch Series 4Size, Dimensions & Wrist Fit
Case Width
38mm
Thickness
10.7mm
Lug-to-Lug
44mm
Weight
48g
The Apple Watch Series 4 sits best on flat wrist widths of about 46–63mm (≈ 12.3–16.8cm wrist circumference). Adjust the slider below to check your wrist.
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The Watch Series 4 in short
The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.
- Between 18 hours and 0.75 days per charge depending on the power mode — smartwatch at best, gps at worst.
- Water rated to 50 m.
- 48g on the wrist. Heavier than 72% of the 38mm watches we have weights for.
- 1.78 inches OLED/AMOLED display.
Does the Watch Series 4 fit your wrist?
Drag the slider to your wrist width and see the Watch Series 4 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.
Apple Watch Series 4
Case 44.0mm · Lug-to-lug 44.0mm · Thickness 10.7mm · 48g
Balanced Fit
44mm 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 44mm, 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 wrist5.5mm spare each side
Comfortable, with visible skin either side.
- Off the wrist10.7mm off the skin
Normal sports-watch height for a wrist this size. (10.7mm case, back against the skin)
- How it seats~4.7mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist48g
Light enough to forget you have it on. (0.9g per mm of wrist)
Happy with the fit? Check current availability for the Watch Series 4.
Check offer2D Dimension Schematics
The Watch Series 4 drawn to scale — from above, and in profile against the wrist.
- Apple Watch Series 438mm × 44mm · 10.7mm thick
3D preview
Apple Watch Series 4 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.
How long the Watch Series 4 lasts, by power mode
Runtime changes by a factor of 1 depending on what you leave switched on. Bars are scaled against the longest mode.
- Smartwatch0.75 days
- GPS18 hours
How the Watch Series 4 ranks on battery
Against the 77 Apple watches in our database, ranked on each figure Apple publishes.
- Everyday use18 hours#15 of 77
- GPS tracking18 hours#1 of 10
- Capacity292 mAh#33 of 44
Top three in the Apple range for continuous GPS tracking.
Watch Series 4 specifications
The figures that decide a purchase, followed by every line Apple publishes.
- Battery life
- 0.75 days
- Display
- 1.78 inches
- Resolution
- 384 x 480 px
- Water rating
- 5 ATM
- Storage
- 16GB
- Charging
- 2 hours
Full specification sheet
103 published lines across 8 groups, unedited
Design
- width
- 38
- height
- 44
- volume
- 17.89 cm³
- weight
- 48 g
- thickness
- 10.7
- ATM rating
- 5 ATM
- resolution
- 384 x 480 px
- screen size
- 1.78 inches
- Display type
- OLED/AMOLED
- Has a display
- pixel density
- 345 ppi
- water resistance
- Waterproof
- Always-On Display
- has a touch screen
- waterproof depth rating
- 50 m
- Watch band is replaceable
- Has sapphire glass display
- has branded damage-resistant glass
Battery
- charge time
- 2 hours
- battery life
- 0.75 days
- battery power
- 291.8 mAh
- has wireless charging
- has a removable battery
- battery life with GPS on
- 18 hours
- Has a solar power battery
- has a rechargeable battery
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
- release date
- 2017-09-12
- Has a stopwatch
- Has smart alarm
- Has call control
- Has silent alarm
- internal storage
- 16GB
- Has notifications
- Has ECG technology
- Locates your phone
- has a front camera
- has fall detection
- has voice commands
- Acquires GPS faster
- Has vibrating alerts
- number of microphones
- 1
- Can be used to answer calls
- has irregular heart rate warnings
- Has a built-in camera remote control function
Connectivity
- has NFC
- SIM cards
- 1 eSIM
- Wi-Fi version
- Wi-Fi 4 (802.11n)
- supports ANT+
- supports Wi-Fi
- supports Galileo
- Bluetooth version
- 5
- has a cellular module
- Is compatible with iOS
- Is compatible with Android
Miscellaneous
- has aptX
- Has passcode
- Has auto pause
- Is compatible with Windows
- Is compatible with Mac OS X
- has an external memory slot
- Compatible with smart scales
- has a battery level indicator
- has a socket for a 3.5 mm audio jack
- Compatible with external heart rate monitors
App & Software
- Ad-free
- Free app
- Has coaching
- Has achievements
- Has goal setting
- Has exercise diary
- Can be personalised
- Has weight tracking
- Predicts start date
- Tracks water intake
- Has inactivity alerts
- Has period notifications
- Has temperature tracking
- 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
- Has a stroke counter for swimming
Alternatives to the Watch Series 4
Watches that cover a similar amount of wrist, with the measurements that separate them.
Apple
Watch SE 3 - GPS + Cellular · 44mm
- Width
- 38mm
- Thick
- 10.7mm
- Weight
- 33g
Apple
Watch SE 3 - GPS · 44mm
- Width
- 38mm
- Thick
- 10.7mm
- Weight
- 32.9g
Apple
Watch Series 9 - Stainless Steel · 45mm
- Width
- 38mm
- Thick
- 10.7mm
- Weight
- 51.5g
Apple
Watch Series 9 - 45mm
- Width
- 38mm
- Thick
- 10.7mm
- Weight
- 38.8g
Apple
Watch Series 8 - Stainless Steel · 45mm
- Width
- 38mm
- Thick
- 10.7mm
- Weight
- 51.5g
Apple
Watch Series 8 - GPS · Aluminium · 45mm
- Width
- 38mm
- Thick
- 10.7mm
- Weight
- 38.8g
Watch Series 4 — Frequently Asked Questions
Will the Apple Watch Series 4 fit my wrist?
The Apple Watch Series 4 looks balanced on flat wrist widths of roughly 46–63mm (about 12.3–16.8cm circumference). Drag the slider above to check it against your own measurement.
How long does the Apple Watch Series 4 battery last?
Between 18 hours and 0.75 days per charge, depending on the power mode. Apple rates Smartwatch at 0.75 days and GPS at 18 hours; the chart above lists all 2 modes.
How does the Apple Watch Series 4 battery compare with other Apple watches?
At 18 hours in everyday use it ranks #15 of the 77 Apple watches in our database — the top 19% of the range. The full ranking, including GPS and power-saving figures, is on our Apple battery life comparison.
Is the Apple Watch Series 4 thick for a 38mm watch?
At 10.7mm, middle of the pack for thickness at this width. Thickness, not case width, is what decides whether a watch catches on a shirt cuff.
What other watches are the same size as the Apple Watch Series 4?
Huawei Watch Fit 4, Certina DS Action Diver 38 Powermatic 80 PVD / Black, Omega Railmaster Omega Co-Axial Master Chronometer 38 Stainless Steel / Grey Gradient, TAG Heuer Formula 1 Solargraph 38 Black Polylight / Black / Rubber all sit within half a millimetre of the Apple Watch Series 4's 38mm case, so they cover the same amount of wrist.
What is the lug-to-lug of the Apple Watch Series 4?
44mm, against a 38mm case width. Lug-to-lug is the measurement that decides overhang: if it exceeds the flat width of your wrist, the lugs sit past the edge no matter how modest the case diameter looks.
