Garmin · 2021
Forerunner 55Size, Dimensions & Wrist Fit
The Garmin Forerunner 55 sits best on flat wrist widths of about 44–60mm (≈ 11.7–16.0cm wrist circumference). Adjust the slider below to check your wrist.
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The Forerunner 55 in short
The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.
- Between 20 hours and 14 days per charge depending on the power mode — smartwatch at best, gps at worst.
- Water rated to 50 m.
- 37g on the wrist. Lighter than 75% of the 42mm watches we have weights for.
- 1 inches LCD display, always-on capable.
- Takes 20mm bands, so third-party straps fit without an adapter.
Does the Forerunner 55 fit your wrist?
Drag the slider to your wrist width and see the Forerunner 55 overlaid at true scale. Lug-to-lug — not case diameter — decides whether a watch overhangs your wrist.
Happy with the fit? Check current availability for the Forerunner 55.
Check offer2D Dimension Schematics
The Forerunner 55 drawn to scale — from above, and in profile against the wrist.
- Garmin Forerunner 5542mm · 11.6mm thick
3D preview
Garmin Forerunner 55 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 Forerunner 55 lasts, by power mode
Runtime changes by a factor of 17 depending on what you leave switched on. Bars are scaled against the longest mode.
- Smartwatch14 days
- GPS20 hours
How the Forerunner 55 ranks on battery
Against the 268 Garmin watches in our database, ranked on each figure Garmin publishes.
- Everyday use14 days#116 of 257
- GPS tracking20 hours#149 of 233
What size band does the Forerunner 55 take?
Lug width
20mm
Any 20mm strap fits, so you are not restricted to Garmin's own bands. Quick-release pins let you swap without tools — check that a replacement lists 20mm and quick-release before buying.
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Forerunner 55 specifications
The figures that decide a purchase, followed by every line Garmin publishes.
- Battery life
- 14 days
- Display
- 1 inches
- Resolution
- 208 x 208 px
- Water rating
- 5 ATM
- Strap
- 20 mm
- Storage
- 31.25MB
Full specification sheet
116 published lines across 8 groups, unedited
Design
- width
- 42
- height
- 42
- volume
- 20.46 cm³
- weight
- 37 g
- thickness
- 11.6
- ATM rating
- 5 ATM
- resolution
- 208 x 208 px
- screen size
- 1 inches
- Display type
- LCD
- Has a display
- pixel density
- 294 ppi
- width of band
- 20 mm
- water resistance
- Waterproof
- Always-On Display
- has a touch screen
- is designed for kids
- waterproof depth rating
- 50 m
- Watch band is replaceable
- Has sapphire glass display
- maximum operating temperature
- 60 °C
- has branded damage-resistant glass
- lowest potential operating temperature
- -20 °C
Battery
- battery life
- 14 days
- has wireless charging
- has a removable battery
- battery life with GPS on
- 20 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
- 2021-06-02
- Has a stopwatch
- Has smart alarm
- warranty period
- 1 years
- Has call control
- Has silent alarm
- has HRV tracking
- internal storage
- 31.25MB
- measures VO2 max
- 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
- 0
- 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
- 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 auto pause
- Available on PC
- 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
- Tracks BMI
- Has coaching
- Includes maps
- Supports routes
- Has achievements
- Has goal setting
- Has live tracking
- Has exercise diary
- Predicts ovulation
- Can be personalised
- Has weight tracking
- Predicts start date
- Tracks water intake
- Has inactivity alerts
- Has period notifications
- Has temperature tracking
- Doesn’t require account
- Provides activity reports
- Displays fertile window notifications
- 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 Forerunner 55
Watches that cover a similar amount of wrist, with the measurements that separate them.
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Garmin
epix™ Pro (Gen 2) – Sapphire Edition | 42 mm
- Width
- 42mm
- Thick
- 14.2mm
- Weight
- 63g
%20%E2%80%93%20Standard%20Edition%20%7C%2042%20mm.jpg&w=3840&q=75)
Garmin
epix™ Pro (Gen 2) – Standard Edition | 42 mm
- Width
- 42mm
- Thick
- 14.2mm
- Weight
- 63g
Garmin
fēnix® 7S Pro – Sapphire Solar Edition
- Width
- 42mm
- Thick
- 14.1mm
- Weight
- 58g
Garmin
fēnix® 7S Pro – Solar Edition
- Width
- 42mm
- Thick
- 14.1mm
- Weight
- 63g
Garmin
Approach® S70 - 42 mm
- Width
- 42mm
- Thick
- 12.6mm
- Weight
- 44g
Garmin
Bounce
- Width
- 42mm
- Thick
- 12.6mm
- Weight
- 37.2g
Forerunner 55 — Frequently Asked Questions
Will the Garmin Forerunner 55 fit my wrist?
The Garmin Forerunner 55 looks balanced on flat wrist widths of roughly 44–60mm (about 11.7–16.0cm circumference). Drag the slider above to check it against your own measurement.
What size band does the Garmin Forerunner 55 take?
20mm. Any 20mm strap fits, so you are not limited to Garmin's own bands — look for a quick-release fitting if you want to swap without tools.
How long does the Garmin Forerunner 55 battery last?
Between 20 hours and 14 days per charge, depending on the power mode. Garmin rates Smartwatch at 14 days and GPS at 20 hours; the chart above lists all 2 modes.
How does the Garmin Forerunner 55 battery compare with other Garmin watches?
At 14 days in everyday use it ranks #116 of the 257 Garmin watches in our database — the top 45% of the range. The full ranking, including GPS and power-saving figures, is on our Garmin battery life comparison.
Is the Garmin Forerunner 55 thick for a 42mm watch?
At 11.6mm, thinner than 71% of 42mm 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.
What other watches are the same size as the Garmin Forerunner 55?
Certina DS Action Chrono PVD / Carbon / Bracelet, Omega Speedmaster Professional Moonwatch 3861 Moonshine Gold / Black Lacquer, TAG Heuer Carrera Chronograph Seafarer Stainless Steel / Silver, Huawei Watch 5 - 42mm all sit within half a millimetre of the Garmin Forerunner 55's 42mm case, so they cover the same amount of wrist.
