Garmin Descent G2 — case dimensions and design

Garmin · 2025

Descent G2Size, Dimensions & Wrist Fit

Case Width

45.5mm

Thickness

15.2mm

Battery

10 days

Weight

65g

The Garmin Descent G2 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 Descent™ G2 in short

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

Between 15 hours and 12 days per charge depending on the power mode — battery saver at best, all satellite systems at worst.
Water rated to Dive (100 meters).
65g on the wrist. Heavier than 87% of the 46mm watches we have weights for.
1.2" (30.4 mm) diameter AMOLED display.
Takes 22mm bands, so third-party straps fit without an adapter.

Does the Descent G2 fit your wrist?

Drag the slider to your wrist width and see the Descent G2 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

≈ 146.9mm around

Garmin Descent™ G2

Case 45.5mm · Lug-to-lug 45.5mm · Thickness 15.2mm · 65g

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Balanced Fit

45.5mm on a 55mm wrist

Understated Balanced Sweet Spot Bold Overhang ⚠

Across the wrist it works — 4.8mm spare each side — but a tall watch on this wrist. Fine over a sleeve, awkward under one.

On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 45.5mm, 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. 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.

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 wrist4.8mm spare each side
Comfortable, with visible skin either side.
Off the wrist15.2mm off the skin
A tall watch on this wrist. Fine over a sleeve, awkward under one. (15.2mm case, back against the skin)
How it seats~5.4mm under the rim
Seats well, with the case back following most of the wrist.
Weight on the wrist65g
Substantial without being a burden — the usual weight of a steel watch on a wrist this size. (1.2g per mm of wrist)

Happy with the fit? Check current availability for the Descent G2.

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2D Dimension Schematics

The Descent™ G2 drawn to scale — from above, and in profile against the wrist.

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From above — true scale

From the side — how far it sits off the wrist

Garmin Descent™ G245.5mm · 15.2mm thick

3D preview

Garmin Descent™ G2 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 Descent™ G2 lasts, by power mode

Runtime changes by a factor of 19 depending on what you leave switched on. Bars are scaled against the longest mode.

always-on displayraise-to-wake

Battery Saver12 days
Smartwatch10 days · 4 days always-on
Expedition GPS10 days
Max Battery GPS44 hours
Dive27 hours
GPS Only20 hours
All Satellite Systems15 hours

How the Descent™ G2 ranks on battery

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

Everyday use12 days#183 of 285
GPS tracking44 hours#120 of 267

See all 296 Garmin watches ranked by battery life

What size band does the Descent™ G2 take?

Lug width

22mm

Any 22mm 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 22mm and quick-release before buying.

Shop 22mm bands

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Descent™ G2 specifications

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

Battery life: Dive Mode: Up to 27 hours Smartwatch: Up to 10 days (4 days always-on) Battery Saver Watch Mode: Up to 12 days GPS Only: Up to 20 hours All Satellite Systems: Up to 15 hours Max Battery GPS: Up to 44 hours Expedition GPS: Up to 10 days
Display: 1.2" (30.4 mm) diameter
Resolution: 390 x 390 pixels
Water rating: Dive (100 meters)
Case material: fiber-reinforced ocean-bound plastic
Bezel: fiber-reinforced ocean-bound plastic
Glass: sapphire crystal
Strap: silicone
Storage: 4 GB
Charging: Garmin proprietary clip charger

Full specification sheet

287 published lines across 22 groups, unedited

Overview

Family: Garmin

General

Battery life: Dive Mode: Up to 27 hours Smartwatch: Up to 10 days (4 days always-on) Battery Saver Watch Mode: Up to 12 days GPS Only: Up to 20 hours All Satellite Systems: Up to 15 hours Max Battery GPS: Up to 44 hours Expedition GPS: Up to 10 days
Display Size: 1.2" (30.4 mm) diameter
Case material: fiber-reinforced ocean-bound plastic
Color display
Lens Material: sapphire crystal
Bezel Material: fiber-reinforced ocean-bound plastic
Memory/History: 4 GB
Strap material: silicone
Charging method: Garmin proprietary clip charger
Large font option
Display resolution: 390 x 390 pixels
Leakproof inductive buttons
QuickFit® watch band compatible: yes (22 mm)

Sensors

GPS
Compass
GLONASS
Galileo
Gyroscope
Thermometer
Depth sensor
Accelerometer
Barometric altimeter
Pulse Ox Blood Oxygen Saturation Monitor
Garmin Elevate™ wrist heart rate monitor

Product Info

Main SKU: 010-02986-00
Product ID: 1558977
Product Name: Descent™ G2
Release Date: 2/14/2025
Product Variation: Black with Black Band

Clock Features

Timer
Stopwatch
Time/date
Alarm clock
GPS Time Sync
Sunrise/sunset times
Automatic daylight saving time

Diving Features

PO2: Up to 2.0 with customizable deco PO2 setting
Tides
Backlight: yes (configurable time and intensity; auto-on at depth)
Gas mixes: Air, Nitrox and Trimix up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gasses.
APNEA mode
Deep Stops: yes (using custom gradient factors)
Gauge mode
Pool APNEA
No fly time
Safety Stop: yes (customizable off/3min/5min)
Dive planner: yes (basic NDL + multi-gas deco planner)
Dive readiness
Multi-gas mode
Nitrox support
Trimix support
APNEA hunt mode
Alerts & alarms: Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching. Customizable (up to 40) audible and/or vibration per dive mode, based on depth or time
Single-gas mode
3-axis dive compass: yes (with adjustable heading, quick change to 90R, 90L and reciprocal). Indicates degrees and direction back to set heading
Auto start/end dive
Decompression model: Bühlmann ZHL-16c with gradient factors
Missed Deco Lockout: yes (can be disabled prior to dive with user acknowledgement)
Custom end-dive timeout: yes (20s to 10 m)
Custom dive data screens
Customizable conservatism: yes (low/medium/high or custom using gradient factors)
Surface diver status widget: yes (surface interval, N2/HE loading, CNS, OTU and tissue compartment status)
Automatic altitude adjustment
Residual Tissue Loading Reset: yes (on the surface with user acknowledgement)
Closed Circuit Rebreather (CCR)
Dive ascent/descent rate indicator
Dive activity maximum operating depth: 100 meters
Sync dive log to Garmin Dive™ Mobile app
Automatically saves dive entry and exit locations

Gaming Features

Gaming Activity
GameOn™ app compatible

Cycling Features

Courses
MTB Grit & Flow
Race an activity
Power meter compatible
Advanced cycling dynamics
Compatible with Varia™ lights
FTP (Functional Threshold Power): yes (with compatible accessory)
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)

Golfing Features

Tournament legal
Digital scorecard
Garmin AutoShot™
Round timer/odometer
Auto CourseView updates
Yardage to layups/doglegs
Hazards and course targets
Pairs with Garmin Golf app
Green View with manual pin position
CT10 Automatic club tracking compatible (requires accessory)
Yardage to F/M/B (distance to front, middle and back of green)
Stat tracking (strokes, putts per round, greens and fairways hit)
Measures shot distance (calculates exact yardage for shots from anywhere on course): manual

Running Features

Run workouts
Running power
Race predictor
Foot pod capable
Running dynamics
Lactate threshold: yes (with compatible accessory)
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
Cadence (provides real-time number of steps per minute)

What You'll Love

Touchscreen
Display type: AMOLED
Water rating: Dive (100 meters)
Garmin Pay™
Training status
Training readiness
Pulse Ox blood oxygen: yes (spot-check, during sleep, all day)
Sleep score and insights
Battery life (smartwatch mode): up to 10 days (4 days always-on)

Activity Profiles

Gym: Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing
Dive: Diving
Swim: Pool Swimming, Open Water Swimming
Cycling: Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX
Wellness: Walking, Pilates, Yoga , Indoor Walking
Multisport: Swimming/Running, 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
Motor sports: Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling
On the Water: Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Whitewater
Racket sports: Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball
Snow & winter: Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, Backcountry Skiing, Ice Skating, Snowshoeing
Indoor running: Treadmill Running, Indoor Track Running, Virtual Running
Outdoor running: Running, Outdoor Track Running, Trail Running, Obstacle Racing
Outdoor recreation: Hiking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery
Other activity profiles: Tactical, Inline Skating

Swimming Features

Pool swim workouts
Time and distance alerts
Auto rest (pool swim only)
Drill logging (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-Tri, HRM-Swim, HRM-Pro or HRM-Pro Plus)

Tactical Features

XERO™ Locations
Dual grid coordinates

Outdoor Recreation

Tides
TracBack®
Sight 'N Go
Tide glance
Back to start
Fish forecast
UltraTrac mode
Vertical speed
GPS coordinates
Reference point
Area calculation: yes (via Connect IQ™)
Elevation profile
Projected waypoint
Total ascent/descent
Future elevation plot
Distance to destination
Expedition GPS Activity
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

Calendar
Connectivity: Bluetooth® Smart, ANT+®
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
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 Running Coach Experts
On-screen workout animations
On-screen workout muscle maps
Daily Suggested Workout - Cycling
Daily Suggested Workout - Running
Daily Suggested Workout - Walking
Garmin Coach - Prebuilt Cycling Plans

Health & Wellness Monitoring

Sleep
Hydration: yes (in Garmin Connect™)
Breathwork
Fitness age
Sleep coach
Nap detection
All-day stress
Women's health: yes (in Garmin Connect™)
Health snapshot
Respiration rate
Resting heart rate
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
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
Manual lap
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
VO2 Max (Trail Run)
GPS speed and distance
Configurable lap alerts
Customizable data pages
Unified training status
Touch and/or button lock
Activity history on watch
Downloadable training plans
Training effect (anaerobic)
Manual multisport activities
HRM running pace and distance
Heat and altitude acclimation
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)
Power Modes - customizable in-activity battery settings
HR broadcast (broadcasts HR data over ANT+® to paired devices)
Improved interval (includes open repeats, intervals data page, rest screen and auto detection)

Compare the Descent™ G2 head to head

How each one differs in the three measurements you can feel on the wrist. Figures are relative to the Descent™ G2.

Garmin

Descent™ G1 Solar

Width: same mm
Thick: same mm
Weight: +1g

Full comparison

Garmin

Descent™ G1 Solar - Ocean Edition

Width: same mm
Thick: same mm
Weight: -4g

Full comparison

Garmin

Descent™ Mk3i – 43 mm

Width: -2.5mm
Thick: -0.9mm
Weight: -15.7g

Full comparison

Garmin

Descent™ Mk3i – 51 mm

Width: +5.5mm
Thick: +1.2mm
Weight: +12.8g

Full comparison

Alternatives to the Descent™ G2

Watches that cover a similar amount of wrist, with the measurements that separate them.

Descent™ G2 — Frequently Asked Questions

Will the Garmin Descent G2 fit my wrist?

The Garmin Descent G2 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.

What size band does the Garmin Descent G2 take?

22mm. Any 22mm 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 Descent G2 battery last?

Between 15 hours and 12 days per charge, depending on the power mode. Garmin rates Battery Saver at 12 days and All Satellite Systems at 15 hours; the chart above lists all 7 modes.

How does the Garmin Descent G2 battery compare with other Garmin watches?

At 12 days in everyday use it ranks #183 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 Descent G2 thick for a 46mm watch?

At 15.2mm, thicker than 82% of 46mm watches — it will sit noticeably high on the wrist. 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 Descent G2?

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 Descent G2's 45.5mm case, so they cover the same amount of wrist.

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