Garmin D2 Delta S — case dimensions and design

Garmin · 2018

D2 Delta SSize, Dimensions & Wrist Fit

Case Width

42mm

Thickness

15.4mm

Battery

25 hours

Weight

65g

The Garmin D2 Delta S 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 D2™ Delta S in short

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

Rated for 25 hours of use per charge.
65g on the wrist. Heavier than 84% of the 42mm watches we have weights for.
1.2" (30.4 mm) diameter display.
Takes 20mm bands, so third-party straps fit without an adapter.

Does the D2 Delta S fit your wrist?

Drag the slider to your wrist width and see the D2 Delta S 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 D2™ Delta S

Case 42.0mm · Lug-to-lug 42.0mm · Thickness 15.4mm · 65g

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Balanced Fit

42mm on a 55mm wrist

Understated Balanced Sweet Spot Bold Overhang ⚠

Across the wrist it works — 6.5mm 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 42mm, 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 wrist6.5mm spare each side
Comfortable, with visible skin either side.
Off the wrist15.4mm off the skin
A tall watch on this wrist. Fine over a sleeve, awkward under one. (15.4mm case, back against the skin)
How it seats~4.0mm 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 D2 Delta S.

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2D Dimension Schematics

The D2™ Delta S 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 D2™ Delta S42mm · 15.4mm thick

3D preview

Garmin D2™ Delta S 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.

D2™ Delta S battery life

The runtime the manufacturer publishes for everyday use.

Smartwatch25 hours

How the D2™ Delta S ranks on battery

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

Everyday use7 days#241 of 285
GPS tracking11 hours#240 of 267

See all 296 Garmin watches ranked by battery life

What size band does the D2™ Delta S 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.

Shop 20mm bands

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D2™ Delta S specifications

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

Battery life: Smartwatch mode: Up to 7 daysGPS mode: Up to 11 hoursGPS + Music: Up to 4.5 hoursUltraTrac™ mode: Up to 25 hours
Display: 1.2" (30.4 mm) diameter
Resolution: 240 x 240 pixels
Case material: fiber-reinforced polymer with metal rear cover
Bezel: stainless steel
Glass: domed sapphire crystal
Strap: silicone or leather
Storage: 16 GB

Full specification sheet

189 published lines across 19 groups, unedited

Overview

Family: Garmin

General

Battery life: Smartwatch mode: Up to 7 daysGPS mode: Up to 11 hoursGPS + Music: Up to 4.5 hoursUltraTrac™ mode: Up to 25 hours
Display Size: 1.2" (30.4 mm) diameter
Case material: fiber-reinforced polymer with metal rear cover
Color display
Lens Material: domed sapphire crystal
Bezel Material: stainless steel
Memory/History: 16 GB
Strap material: silicone or leather
Display resolution: 240 x 240 pixels
QuickFit® watch band compatible: yes (20 mm)

Sensors

GPS
Compass
GLONASS
Galileo
Gyroscope
Thermometer
Accelerometer
Barometric altimeter
Garmin Elevate™ wrist heart rate monitor

Product Info

Main SKU: 010-01987-30
Product ID: 633685
Product Name: D2™ Delta S
Product Variation: Aviator Watch with Beige Leather 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
Compatible with Varia™ lights
FTP (Functional Threshold Power): yes (with compatible accessory)
Speed and cadence sensor support (w/sensor)
Cycle Map (routable cycling-specific street map)
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

Digital scorecard
Garmin AutoShot™
Round timer/odometer
TruSwing™ compatible
Auto CourseView updates
Yardage to layups/doglegs
Hazards and course targets
Green View with manual pin position
Preloaded with 43,000 courses worldwide
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): automatic

Running Features

Run workouts
Race predictor
Foot pod capable
Running dynamics: yes (with compatible accessory)
Lactate threshold: yes (with compatible accessory)
Trail run auto climb
Performance condition
Stride length (real time): yes (with compatible accessory)
Vertical oscillation and ratio: yes (with compatible accessory)
Ground contact time and balance: yes (with compatible accessory)
GPS-based distance, time and pace
Cadence (provides real-time number of steps per minute)

What You'll Love

Garmin Pay™
Training status

Activity Profiles

Gym: Strength, Cardio and Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Yoga
Swim: Pool Swimming, Open Water Swimming, Swimming/Running
Cycling: Biking, Mountain Biking, Triathlon
Outdoor recreation: Hiking, Climbing, Mountain Biking, Skiing, Snowboarding, XC Classic Skiing, Stand Up Paddleboarding, Rowing, Kayaking, Jumpmaster, Tactical

Aviation Features

NEXRAD on moving map
Waypoint information page
Connext avionics connectivity
Worldwide airport database(s)
Multiple time zones with Zulu/UTC
TAF (Terminal Aerodrome Forecast)
Altimeter with adjustable baro setting
METAR (Meteorological Aerodrome Report)
Worldwide NAVAID and Intersection database(s)
Wirelessly receive flight plans from Garmin Pilot™
3-axis compass with HSI (horizontal situation indicator)
Moving Map with aviation airports, navaids, roads, bodies of water and more

Swimming Features

Pool swim workouts
Drill logging (pool swim only)
"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™ and HRM-Swim™)

Tactical Features

XERO™ Locations
Dual grid coordinates

Outdoor Recreation

Tides: yes (via Connect IQ™)
TracBack®
Sight 'N Go
Back to start
Fish forecast: yes (via Connect IQ™)
Explore Nearby
UltraTrac mode
Vertical speed
GPS coordinates
Area calculation: yes (via Connect IQ™)
Elevation profile
Projected waypoint
Total ascent/descent
Future elevation plot
Distance to destination
Sun and moon information: yes (via Connect IQ™)
Point-to-point navigation
ClimbPro™ Ascent Planner
Preloaded road and trail maps
Bread crumb trail in real time
Downloadable cartography support
Barometric trend indicator with Storm Alert

Daily Smart Features

Calendar
Connectivity: Bluetooth®, ANT+®, Wi-Fi®
Find My Phone
Find My Watch
VIRB® Remote
Weather forecasts
Smart Notifications
Smartphone compatibility: iPhone®, Android™
Controls smartphone music
Plays and controls watch music
Pairs with Garmin Connect™ Mobile
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

Cardio workouts
Strength workouts

Health & Wellness Monitoring

Sleep: yes (advanced)
Hydration: yes (in Garmin Connect™)
Fitness age: yes (in app)
All-day stress
Women's health: yes (in Garmin Connect™)
Resting heart rate
Abnormal heart rate alerts: yes (high and low)
Wrist-based heart rate (constant, every second)

Training, Planning and Analysis Features

% HRR
% HR max
HR zones
HR alerts
Shortcuts
Manual lap
Auto max HR
Auto scroll
Finish time
HR calories
Voice alerts
Custom alerts
Recovery time
Training load
VO2 Max (Run)
Course guidance
Training effect
Virtual Partner
Race an Activity
Advanced workouts
Interval training
Garmin Live Segments
Strava Live Segments
GPS speed and distance
Configurable lap alerts
Customizable data pages
Touch and/or button lock
Activity history on watch
Downloadable training plans
Training effect (anaerobic)
Manual multisport activities
Customizable activity profiles
Trendline™ Popularity Routing
Auto Pause® automatic timer halt
Auto Lap® interval tracking feature
Round-trip course creator (running/cycling)
HR broadcast (broadcasts HR data over ANT+® to paired devices)
HRV stress test (measures your heart rate variability while standing still, for 3 minutes, to provide you with an estimated stress level; the scale of this is 1 to 100; low scores indicate lower stress levels): yes (with compatible accessory)

Alternatives to the D2™ Delta S

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

D2™ Delta S — Frequently Asked Questions

Will the Garmin D2 Delta S fit my wrist?

The Garmin D2 Delta S 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 D2 Delta S 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 D2 Delta S battery last?

Garmin rates it at 25 hours per charge in everyday use.

How does the Garmin D2 Delta S battery compare with other Garmin watches?

At 7 days in everyday use it ranks #241 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 D2 Delta S thick for a 42mm watch?

At 15.4mm, thicker than 88% of 42mm 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 D2 Delta S?

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 D2 Delta S's 42mm case, so they cover the same amount of wrist.

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