Garmin · 2022
Forerunner® 255 MusicSize, Dimensions & Wrist Fit
The Garmin Forerunner® 255 Music sits best on flat wrist widths of about 48–65mm (≈ 12.8–17.4cm wrist circumference). Adjust the slider below to check your wrist.
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The Forerunner® 255 Music in short
The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.
- Between 6.5 hours and 14 days per charge depending on the power mode — smartwatch at best, all-systems gnss with music at worst.
- Water rated to 5 ATM.
- 49g on the wrist. Lighter than 70% of the 46mm watches we have weights for.
- 1.3" (33 mm) diameter Sunlight-visible, transflective memory-in-pixel (MIP) display.
- Corning® Gorilla® Glass 3 case, Corning® Gorilla® Glass 3 glass.
Does the Forerunner® 255 Music fit your wrist?
Drag the slider to your wrist width and see the Forerunner® 255 Music 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® 255 Music.
Check offer2D Dimension Schematics
The Forerunner® 255 Music drawn to scale — from above, and in profile against the wrist.
- Garmin Forerunner® 255 Music45.6mm · 12.9mm thick
3D preview
Garmin Forerunner® 255 Music 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® 255 Music lasts, by power mode
Runtime changes by a factor of 52 depending on what you leave switched on. Bars are scaled against the longest mode.
- Smartwatch14 days
- GPS-only GNSS30 hours
- All-Systems GNSS25 hours
- All-Systems GNSS plus Multi-Band16 hours
- All-Systems GNSS with music6.5 hours
How the Forerunner® 255 Music ranks on battery
Against the 268 Garmin watches in our database, ranked on each figure Garmin publishes.
- Everyday use14 days#116 of 257
- GPS tracking30 hours#92 of 233
Forerunner® 255 Music specifications
The figures that decide a purchase, followed by every line Garmin publishes.
- Battery life
- Smartwatch mode: Up to 14 days GPS-only GNSS mode: Up to 30 hours All-Systems GNSS mode with music: Up to 6.5 hours All-Systems GNSS mode: Up to 25 hours All-Systems GNSS mode plus Multi-Band:Up to 16 hours See Details
- Display
- 1.3" (33 mm) diameter
- Resolution
- 260 x 260 pixels
- Water rating
- 5 ATM
- Bezel
- fiber-reinforced polymer
- Glass
- Corning® Gorilla® Glass 3
- Strap
- silicone
- Storage
- 4 GB
- Charging
- Garmin proprietary plug charger
Full specification sheet
233 published lines across 18 groups, unedited
Overview
- Family
- Garmin
General
- Battery life
- Smartwatch mode: Up to 14 days GPS-only GNSS mode: Up to 30 hours All-Systems GNSS mode with music: Up to 6.5 hours All-Systems GNSS mode: Up to 25 hours All-Systems GNSS mode plus Multi-Band:Up to 16 hours See Details
- Battery type
- Lithium ion
- Display Size
- 1.3" (33 mm) diameter
- Color display
- Lens Material
- Corning® Gorilla® Glass 3
- Bezel Material
- fiber-reinforced polymer
- Memory/History
- 4 GB
- Strap material
- silicone
- Charging method
- Garmin proprietary plug charger
- Large font option
- Display resolution
- 260 x 260 pixels
- Quick Release bands
- yes (22 mm, Industry standard)
Sensors
- GPS
- QZSS
- BeiDou
- Compass
- GLONASS
- Galileo
- Gyroscope
- Thermometer
- Accelerometer
- SatIQ™ Technology
- Barometric altimeter
- Pulse Ox Blood Oxygen Saturation Monitor
- Garmin Elevate™ wrist heart rate monitor
Product Info
- Main SKU
- 010-02641-21
- Product ID
- 780196
- Product Name
- Forerunner® 255 Music
- Release Date
- 6/1/2022
- Product Variation
- Whitestone
Clock Features
- Timer
- Stopwatch
- Time/date
- Alarm clock
- GPS Time Sync
- Sunrise/sunset times
- Automatic daylight saving time
Cycling Features
- Courses
- Race an activity
- Power meter compatible
- Compatible with Varia™ lights
- Speed and cadence sensor support (w/sensor)
- Bike lap and lap maximum power (with power sensor)
- Compatible with Varia™ radar (rear-facing radar)
- Compatible with Vector™ and Rally™ (power meters)
- Compatible with Varia Vision™ (head-mounted display)
- Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories)
Running Features
- Run workouts
- Running power
- Race predictor
- Foot pod capable
- Running dynamics
- Lactate threshold
- Grade-adjusted pace
- Trail run auto climb
- Performance condition
- Run/Walk/Stand detection
- Stride length (real time)
- PacePro™ Pacing Strategies
- Vertical oscillation and ratio
- Ground contact time and balance
- GPS-based distance, time and pace
- Course- and weather-specific race predictor
- Cadence (provides real-time number of steps per minute)
What You'll Love
- Display type
- Sunlight-visible, transflective memory-in-pixel (MIP)
- Water rating
- 5 ATM
- Garmin Pay™
- Music storage
- Multi-band GPS
- Training status
- yes (improved)
- Pulse Ox blood oxygen
- yes (spot-check, and optional all-day acclimation and in sleep)
- Sleep score and insights
- Battery life (smartwatch mode)
- Up to 14 days
Activity Profiles
- Gym
- Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Jump Roping
- Swim
- Pool Swimming, Open Water Swimming
- Cycling
- Biking, Mountain Biking, eBiking, eMountain Biking, Indoor Biking
- Wellness
- Walking, Pilates, Yoga, Indoor Walking
- Multisport
- Triathlon
- In the ring
- Boxing, Mixed Martial Arts
- Team sports
- Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball
- On the Water
- Stand Up Paddleboarding, Rowing
- Racket sports
- Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball
- Snow & winter
- Skiing, Snowboarding, XC Classic Skiing
- Indoor running
- Treadmill Running, Indoor Track Running, Virtual Running
- Outdoor running
- Running, Outdoor Track Running, Trail Running, Ultra Running
- Outdoor recreation
- Hiking, Bouldering, Archery
- Other activity profiles
- Inline skating
Swimming Features
- Pool swim workouts
- Critical swim speed
- Time and distance alerts
- Auto rest (pool swim only)
- Drill logging (pool swim only)
- Pacing alerts (pool swim only)
- Countdown start (pool swim only)
- Underwater wrist-based heart rate
- "Repeat on" rest timer (pool swim only)
- Basic rest timer (up from 0) (pool swim only)
- Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only)
- Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories)
- Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories)
- Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim)
- yes (with HRM-Swim, HRM-Pro, HRM-Pro Plus or HRM 600)
Outdoor Recreation
- Up Ahead
- Auto rest
- TracBack®
- Back to start
- UltraTrac mode
- Vertical speed
- Elevation profile
- Projected waypoint
- Total ascent/descent
- Future elevation plot
- Distance to destination
- Sun and moon information
- Point-to-point navigation
- Bread crumb trail in real time
- Barometric trend indicator with Storm Alert
Daily Smart Features
- Stocks
- yes (optional Connect IQ app)
- Calendar
- Passcode
- Connectivity
- Bluetooth®, ANT+®, Wi-Fi®
- Garmin Share
- Find My Phone
- Find My Watch
- VIRB® Remote
- Morning report
- Weather forecasts
- Smart Notifications
- Smart trainer control
- Smartphone compatibility
- iPhone® and Android™
- Controls smartphone music
- On-device Connect IQ™ Store
- Plays and controls watch music
- Find My Phone during GPS activity
- Pairs with Garmin Connect™ Mobile
- Compatible with Garmin Messenger app
- Battery saver (customizable low power watch)
- Realtime settings sync with Garmin Connect™ mobile
- View images from notifications on watch (Android™ only)
- Text response/reject phone call with text (Android™ only)
- Connect IQ™ (downloadable watch faces, data fields and apps)
Activity Tracking Features
- TrueUp™
- Move IQ™
- Step counter
- Floors climbed
- Calories burned
- Distance traveled
- Intensity minutes
- Automatic rep counting
- Garmin Connect™ Challenges app
- yes (optional Connect IQ app)
- Auto goal (learns your activity level and assigns a daily step goal)
Workout and Training Plans
- HIIT workouts
- Yoga workouts
- Pilates workouts
- Strength workouts
- Garmin Cycling Coach
- Garmin Running Coach
- Garmin Coach - Strength
- Garmin Running Coach Experts
- On-screen workout animations
- On-screen workout muscle maps
- Garmin Coach - Prebuilt Cycling Plans
- Daily Suggested Workout - Cycling (Pace and Heart Rate Based)
- Daily Suggested Workout - Running (Pace and Heart Rate Based)
Health & Wellness Monitoring
- Sleep
- yes (advanced)
- Hydration
- yes (in Garmin Connect™ and optional Connect IQ™ widget)
- Meditation
- Fitness age
- Sleep coach
- Nap detection
- All-day stress
- Women's health
- yes (in Garmin Connect™ and optional Connect IQ™ widget)
- Health snapshot
- Jet lag adviser
- Respiration rate
- Resting heart rate
- Breathing variations
- Relaxation reminders
- Abnormal heart rate alerts
- yes (high and low)
- Relaxation breathing timer
- Body Battery™ energy monitor
- Wrist-based heart rate (constant, every second)
Safety and Tracking Features
- Assistance
- Live Event Sharing
- Android™ Only
- Incident Detection during select activities
- Incident detection alert on phone for wearables
Kid Activity Tracking Features
- Toe-to-Toe™ Challenges app
- yes (optional Connect IQ Toe-to-Toe™ Challenges app)
Training, Planning and Analysis Features
- % HRR
- % HR max
- HR zones
- HR alerts
- HRV status
- Load ratio
- Manual lap
- Rest timer
- Auto max HR
- Auto scroll
- Finish time
- HR calories
- Voice alerts
- Custom alerts
- Physio TrueUp
- Recovery time
- Training load
- VO2 Max (Run)
- Course guidance
- Training effect
- Virtual Partner
- Race an Activity
- Advanced workouts
- Interval training
- Race glance/widget
- Training load focus
- VO2 Max (Trail Run)
- GPS speed and distance
- Improved recovery time
- Configurable lap alerts
- Customizable data pages
- Unified training status
- Touch and/or button lock
- Activity history on watch
- Multisport auto transition
- Downloadable training plans
- Training effect (anaerobic)
- Manual multisport activities
- HRM running pace and distance
- Customizable activity profiles
- Auto Pause® automatic timer halt
- Respiration rate (during exercise)
- yes (with compatible accessory)
- Auto Lap® interval tracking feature
- Primary benefit (Training Effect labels)
- HR broadcast (broadcasts HR data over ANT+® to paired devices)
- Improved interval (includes open repeats, intervals data page, rest screen and auto detection)
Alternatives to the Forerunner® 255 Music
Watches that cover a similar amount of wrist, with the measurements that separate them.
Garmin
Forerunner® 255
- Width
- 45.6mm
- Thick
- 12.9mm
- Weight
- 49g
Garmin
Descent™ G2
- Width
- 45.5mm
- Thick
- 15.2mm
- Weight
- 65g
Garmin
Descent™ G1 Solar - Ocean Edition
- Width
- 45.5mm
- Thick
- 15.2mm
- Weight
- 61g
Garmin
Descent™ G1 Solar
- Width
- 45.5mm
- Thick
- 15.2mm
- Weight
- 66g
Garmin
Descent™ G1
- Width
- 45.5mm
- Thick
- 15.2mm
- Weight
- 61g
Garmin
Venu 2
- Width
- 45.4mm
- Thick
- 12.2mm
- Weight
- 49g
Forerunner® 255 Music — Frequently Asked Questions
Will the Garmin Forerunner® 255 Music fit my wrist?
The Garmin Forerunner® 255 Music looks balanced on flat wrist widths of roughly 48–65mm (about 12.8–17.4cm circumference). Drag the slider above to check it against your own measurement.
How long does the Garmin Forerunner® 255 Music battery last?
Between 6.5 hours and 14 days per charge, depending on the power mode. Garmin rates Smartwatch at 14 days and All-Systems GNSS with music at 6.5 hours; the chart above lists all 5 modes.
How does the Garmin Forerunner® 255 Music 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® 255 Music thick for a 46mm watch?
At 12.9mm, 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 Garmin Forerunner® 255 Music?
Honor Watch 5 Pro - Bluetooth, Huawei Watch GT 6 - 46mm, Samsung Galaxy Watch8 LTE Classic, Omega Seamaster Planet Ocean 600M Co-Axial Worldtimer 45.5 Master Chronometer GMT Ceramic / Black - Grey / Rubber all sit within half a millimetre of the Garmin Forerunner® 255 Music's 45.6mm case, so they cover the same amount of wrist.
