WatchFitTool
Garmin Forerunner 265S — case dimensions and design

Garmin · 2023

Forerunner 265SSize, Dimensions & Wrist Fit

Case Width

41.7mm

Thickness

12.9mm

Battery

15 days

Weight

39g

The Garmin Forerunner 265S 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® 265S in short

The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.

  • Between 6 hours and 15 days per charge depending on the power mode — smartwatch at best, all-systems gnss + multi-band with music at worst.
  • Water rated to 5 ATM.
  • 39g on the wrist. Lighter than 68% of the 42mm watches we have weights for.
  • 1.1" (28.1 mm) diameter AMOLED (optional always-on mode) display.
  • Corning® Gorilla® Glass 3 case, Corning® Gorilla® Glass 3 glass.

Does the Forerunner 265S fit your wrist?

Drag the slider to your wrist width and see the Forerunner 265S overlaid at true scale. Lug-to-lug — not case diameter — decides whether a watch overhangs your wrist.

Fit tool

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.

Your wrist
mm
≈ 146.9mm around

Garmin Forerunner® 265S

Case 41.7mm · Lug-to-lug 41.7mm · Thickness 12.9mm · 39g

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Balanced Fit

41.7mm on a 55mm wrist

10:09TUE 12lug to lug 41.7mmyour wrist 55.0mm

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 41.7mm, so you could go bigger.

How to Measure

Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.

  1. 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. 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Complete Wrist Measurement Guide →
Against one you know

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 measurements
  • Across the wrist6.6mm spare each side

    Comfortable, with visible skin either side.

  • Off the wrist12.9mm off the skin

    Normal sports-watch height for a wrist this size. (12.9mm case, back against the skin)

  • How it seats~3.9mm under the rim

    Seats well, with the case back following most of the wrist.

  • Weight on the wrist39g

    Light enough to forget you have it on. (0.7g per mm of wrist)

Happy with the fit? Check current availability for the Forerunner 265S.

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2D Dimension Schematics

The Forerunner® 265S drawn to scale — from above, and in profile against the wrist.

Highlight
From above — true scale
From the side — how far it sits off the wrist
  • Garmin Forerunner® 265S41.7mm · 12.9mm thick

3D preview

Garmin Forerunner® 265S on a wrist

On an arm sized to your own wrist — the view a product photo never gives you.

Open 3D try-on

Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.

How long the Forerunner® 265S lasts, by power mode

Runtime changes by a factor of 60 depending on what you leave switched on. Bars are scaled against the longest mode.

  • Smartwatch15 days
  • GPS-Only GNSS24 hours
  • SatIQ GNSS18 hours
  • All-Systems GNSS + Multi-Band15 hours
  • GPS-Only GNSS with music7.5 hours
  • SatIQ GNSS with music7 hours
  • All-Systems GNSS + Multi-Band with music6 hours
Lithium ion

How the Forerunner® 265S ranks on battery

Against the 296 Garmin watches in our database, ranked on each figure Garmin publishes.

  • Everyday use15 days#144 of 285
  • GPS tracking24 hours#161 of 267
See all 296 Garmin watches ranked by battery life

Forerunner® 265S specifications

The figures that decide a purchase, followed by every line Garmin publishes.

Battery life
Smartwatch mode: Up to 15 days GPS-Only GNSS mode: Up to 24 hours SatIQ (AutoSelect) GNSS mode: Up to 18 hours All-Systems GNSS mode + Multi-Band: Up to 15 hours GPS-Only GNSS mode with music: Up to 7.5 hours SatIQ (AutoSelect) GNSS mode with music: Up to 7 hours All-Systems GNSS mode + Multi-Band with music: Up to 6 hours See Details
Display
1.1" (28.1 mm) diameter
Resolution
360 x 360 pixels
Water rating
5 ATM
Bezel
fiber-reinforced polymer
Glass
Corning® Gorilla® Glass 3
Strap
silicone
Storage
8 GB
Charging
Garmin proprietary plug charger

Full specification sheet

246 published lines across 18 groups, unedited

Overview

Family
Garmin

General

Battery life
Smartwatch mode: Up to 15 days GPS-Only GNSS mode: Up to 24 hours SatIQ (AutoSelect) GNSS mode: Up to 18 hours All-Systems GNSS mode + Multi-Band: Up to 15 hours GPS-Only GNSS mode with music: Up to 7.5 hours SatIQ (AutoSelect) GNSS mode with music: Up to 7 hours All-Systems GNSS mode + Multi-Band with music: Up to 6 hours See Details
Battery type
Lithium ion
Display Size
1.1" (28.1 mm) diameter
Color display
Lens Material
Corning® Gorilla® Glass 3
Bezel Material
fiber-reinforced polymer
Memory/History
8 GB
Strap material
silicone
Charging method
Garmin proprietary plug charger
Large font option
Display resolution
360 x 360 pixels
Quick Release bands
yes (18 mm, Industry standard)

Sensors

GPS
QZSS
BeiDou
Compass
GLONASS
Galileo
Gyroscope
Thermometer
Accelerometer
SatIQ™ Technology
Ambient light sensor
Barometric altimeter
Pulse Ox Blood Oxygen Saturation Monitor
Garmin Elevate™ wrist heart rate monitor

Product Info

Main SKU
010-02810-04
Product ID
886689
Product Name
Forerunner® 265S
Release Date
3/2/2023
Product Variation
Black Bezel with Whitestone Case and Whitestone/Neo Tropic Silicone Band

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
Power curve and % FTP workouts
Compatible with Varia™ lights
Compatible with Varia headlight camera
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
yes (with compatible accessory)
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

Touchscreen
Display type
AMOLED (optional always-on mode)
Water rating
5 ATM
Garmin Pay™
Music storage
Multi-band GPS
Training status
yes (improved)
Training readiness
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 15 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
Fish forecast
yes (via Connect IQ™)
UltraTrac mode
Vertical speed
Area calculation
yes (via Connect IQ™)
Elevation profile
Projected waypoint
Total ascent/descent
Future elevation plot
Distance to destination
Sun and moon information
Point-to-point navigation
Rest Timer (Ultra Run only)
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
Red shift mode
Weather forecasts
Smart Notifications
Smart trainer control
Smartphone compatibility
iPhone®, 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)
Move alerts (displays on device after a period of inactivity)
Auto goal (learns your activity level and assigns a daily step goal)

Workout and Training Plans

HIIT workouts
Yoga workouts
Cardio 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)
Breathwork
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
Shortcuts
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)

Forerunner® 265S — Frequently Asked Questions

Will the Garmin Forerunner 265S fit my wrist?

The Garmin Forerunner 265S 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.

How long does the Garmin Forerunner 265S battery last?

Between 6 hours and 15 days per charge, depending on the power mode. Garmin rates Smartwatch at 15 days and All-Systems GNSS + Multi-Band with music at 6 hours; the chart above lists all 7 modes.

How does the Garmin Forerunner 265S battery compare with other Garmin watches?

At 15 days in everyday use it ranks #144 of the 285 Garmin watches in our database — below the middle of the range. The full ranking, including GPS and power-saving figures, is on our Garmin battery life comparison.

Is the Garmin Forerunner 265S thick for a 42mm 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 265S?

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 265S's 41.7mm case, so they cover the same amount of wrist.

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