WatchFitTool
Garmin Instinct 3 Solar Tactical Edition 45mm — case dimensions and design

Garmin · 2025

Instinct 3 Solar Tactical Edition 45mmSize, Dimensions & Wrist Fit

Case Width

45mm

Thickness

14.9mm

Diameter

45mm

Weight

52g

The Garmin Instinct 3 Solar Tactical Edition 45mm sits best on flat wrist widths of about 47–64mm (≈ 12.6–17.1cm wrist circumference). Adjust the slider below to check your wrist.

Check Wrist FitCompare

Does the Instinct 3 Solar Tactical Edition 45mm fit your wrist?

Drag the slider to your wrist width and see the Instinct 3 Solar Tactical Edition 45mm overlaid at true scale. Lug-to-lug — not case diameter — decides whether a watch overhangs your wrist.

For sports watches, Lug-to-Lug (L2L) is what matters most. Bulky is fine — overhang is not.

mm
40.0mm (small)85.0mm (large)
How to Measure
1

Lay arm flat, palm up.

2

Measure the flat width across top of wrist.

Wrist Width Measurement Guide →
Garmin Instinct 3 Solar Tactical Edition 45mm
Case: 45mmL2L: 45mmThick: 14.9mm
Edge Clearance
+5mm
Check specs
Balanced Fit5mm clearance. Comfortable everyday wear with room to spare.

Compare the Instinct 3 Solar Tactical Edition 45mm with…

vs Garmin Venu 4 - 45mmvs Garmin Instinct® 3 – 45 mm, Solar, Tactical Editionvs Garmin Instinct® E – 45 mmvs Garmin Instinct® 3 – 45 mm, AMOLED

Garmin Instinct 3 Solar Tactical Edition 45mm Full Specifications

Design18
width45
height45
volume30.17 cm³
weight52 g
thickness14.9
ATM rating10 ATM
resolution176 x 176 px
screen size0.9 inches
Display typeLCD
Has a displayYes
pixel density276 ppi
width of band22 mm
water resistanceWaterproof
Always-On DisplayYes
has a touch screenNo
Watch band is replaceableYes
Has sapphire glass displayNo
has branded damage-resistant glassNo
Battery7
battery lifeUnlimited days
has wireless chargingNo
has a removable batteryNo
battery life with GPS on130 hours
Has a solar power batteryYes
has a rechargeable batteryYes
battery life in training mode40 hours
Sensors10
has GPSYes
has a compassYes
Has a barometerYes
has a gyroscopeYes
Has a cadence sensorYes
has an accelerometerYes
Monitors perspirationNo
Has a heart rate monitorYes
Has a temperature sensorYes
Monitors blood oxygenation levelsYes
Features21
release date2025-04-30
Has a stopwatchYes
Has smart alarmNo
warranty period1 years
Has call controlNo
Has silent alarmYes
has HRV trackingYes
internal storage0.13GB
measures VO2 maxYes
Has notificationsYes
Locates your phoneYes
has fall detectionYes
has voice commandsNo
Acquires GPS fasterYes
Has vibrating alertsYes
shows readiness levelYes
Can be used to answer callsNo
measures resting heart rateYes
has irregular heart rate warningsNo
has fast/slow heart rate notificationsYes
Has a built-in camera remote control functionNo
Connectivity7
has NFCYes
supports ANT+Yes
supports Wi-FiNo
supports GalileoYes
has a cellular moduleNo
Is compatible with iOSYes
Is compatible with AndroidYes
Miscellaneous14
Has auto pauseYes
Available on PCYes
Can upload mapsNo
Has trackback modeYes
Has a wind speed sensorNo
Is compatible with WindowsYes
Is compatible with Mac OS XYes
has an external memory slotNo
Compatible with smart scalesYes
has a battery level indicatorYes
Provides the sunrise/sunset timeYes
has a socket for a 3.5 mm audio jackNo
Informs about the risk of thunderstormsYes
Compatible with external heart rate monitorsYes
App & Software22
Ad-freeYes
Free appYes
Tracks BMIYes
Has coachingYes
Includes mapsYes
Supports routesYes
Has achievementsYes
Has goal settingYes
Has live trackingYes
Has exercise diaryYes
Predicts ovulationYes
Can be personalisedYes
Has weight trackingYes
Predicts start dateYes
Tracks water intakeYes
Has inactivity alertsYes
Has period notificationsYes
Has temperature trackingYes
Doesn’t require accountNo
Provides activity reportsYes
Displays fertile window notificationsYes
Counts how many calories you've burnedYes
Activity tracking14
Measures paceYes
Tracks distanceYes
Tracks elevationYes
Designed for golfYes
Tracks your sleepYes
Tracks steps takenYes
Designed for divingNo
Has a route trackerYes
Has exercise taggingYes
Has multi-sport modeYes
Tracks calorie intakeYes
Provides sleep reportsYes
Detects activities automaticallyYes
Has a stroke counter for swimmingYes

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Instinct 3 Solar Tactical Edition 45mm — Frequently Asked Questions

What size is the Garmin Instinct 3 Solar Tactical Edition 45mm?

The Garmin Instinct 3 Solar Tactical Edition 45mm has a 45mm case and is 14.9mm thick.

Will the Garmin Instinct 3 Solar Tactical Edition 45mm fit my wrist?

The Garmin Instinct 3 Solar Tactical Edition 45mm looks balanced on flat wrist widths of roughly 47–64mm (about 12.6–17.1cm circumference). Use the interactive fit tool above to check against your own wrist.

How much does the Garmin Instinct 3 Solar Tactical Edition 45mm weigh?

The Garmin Instinct 3 Solar Tactical Edition 45mm weighs 52g (case only; straps add weight).

What is the best way to compare the Garmin Instinct 3 Solar Tactical Edition 45mm with other watches?

Use our side-by-side comparison tool to see the Garmin Instinct 3 Solar Tactical Edition 45mm next to any other watch — case size, thickness, lug-to-lug and full specs, scaled to real proportions.

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