Garmin Fenix 7 Pro Solar vs Garmin Instinct 3 Solar Tactical Edition 45mmSize, Specs & Wrist Fit Compared
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Garmin
Fenix 7 Pro Solar
Garmin
Instinct 3 Solar Tactical Edition 45mm
The Garmin Fenix 7 Pro Solar wears larger than the Garmin Instinct 3 Solar Tactical Edition 45mm (47mm vs 45mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
On the wrist the Garmin Instinct 3 Solar Tactical Edition 45mm feels lighter (52g vs 79g, case only).
Specification Comparison
| Spec | GarminFenix 7 Pro Solar | GarminInstinct 3 Solar Tactical Edition 45mm |
|---|---|---|
| Case Width | 47mm | 45mm |
| Thickness | 14.5mm | 14.9mm |
| Weight | 79g | 52g |
| Shape | Circular | Circular |
| Water Resistance | 10 ATM | 10 ATM |
| GPS | 73 hours | 130 hours |
| Display | 1.3 inches | 0.9 inches |
| Always-On Display | Yes | Yes |
| Battery life | 22 days | Unlimited days |
| Has wireless charging | No | No |
| Has a removable battery | No | No |
| Battery life with GPS on | 73 hours | 130 hours |
| Has a solar power battery | Yes | Yes |
| Has a rechargeable battery | Yes | Yes |
| Battery life in training mode | 10 hours | 40 hours |
| Has a battery level indicator | Yes | Yes |
| Released | 2023 | 2025 |
Full Specification Comparison
116 specs| Spec | Garmin Fenix 7 Pro Solar | Garmin Instinct 3 Solar Tactical Edition 45mm |
|---|---|---|
| Design | ||
| width | 47 | 45 |
| height | 47 | 45 |
| volume | 32.03 cm³ | 30.17 cm³ |
| weight | 79 g | 52 g |
| thickness | 14.5 | 14.9 |
| ATM rating | 10 ATM | 10 ATM |
| resolution | 260 x 260 px | 176 x 176 px |
| screen size | 1.3 inches | 0.9 inches |
| Display type | LCD | LCD |
| Has a display | Yes | Yes |
| pixel density | 282 ppi | 276 ppi |
| width of band | 26 mm | 22 mm |
| water resistance | Waterproof | Waterproof |
| Always-On Display | Yes | Yes |
| has a touch screen | Yes | No |
| is designed for kids | No | — |
| waterproof depth rating | 100 m | — |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | No |
| has branded damage-resistant glass | No | No |
| Battery | ||
| battery life | 22 days | Unlimited days |
| has wireless charging | No | No |
| has a removable battery | No | No |
| battery life with GPS on | 73 hours | 130 hours |
| Has a solar power battery | Yes | Yes |
| has a rechargeable battery | Yes | Yes |
| battery life in training mode | 10 hours | 40 hours |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | Yes | Yes |
| has a gyroscope | Yes | Yes |
| Has a cadence sensor | No | Yes |
| has an accelerometer | Yes | Yes |
| Monitors perspiration | No | No |
| Has a heart rate monitor | Yes | Yes |
| Has a temperature sensor | Yes | Yes |
| Monitors blood oxygenation levels | Yes | Yes |
| Features | ||
| release date | 2023-05-31 | 2025-04-30 |
| Has a stopwatch | Yes | Yes |
| Has smart alarm | No | No |
| warranty period | 1 years | 1 years |
| Has call control | Yes | No |
| Has silent alarm | Yes | Yes |
| has HRV tracking | Yes | Yes |
| internal storage | 32GB | 0.13GB |
| measures VO2 max | Yes | Yes |
| Has notifications | Yes | Yes |
| Has ECG technology | Yes | — |
| Locates your phone | Yes | Yes |
| has fall detection | Yes | Yes |
| has voice commands | No | No |
| Acquires GPS faster | Yes | Yes |
| Has vibrating alerts | Yes | Yes |
| shows readiness level | Yes | Yes |
| Can be used to answer calls | No | No |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | Yes | No |
| has fast/slow heart rate notifications | Yes | Yes |
| Has a built-in camera remote control function | No | No |
| Connectivity | ||
| has NFC | Yes | Yes |
| supports ANT+ | Yes | Yes |
| supports Wi-Fi | Yes | No |
| supports Galileo | Yes | Yes |
| has a cellular module | No | No |
| Is compatible with iOS | Yes | Yes |
| Is compatible with Android | Yes | Yes |
| Miscellaneous | ||
| Has auto pause | Yes | Yes |
| Available on PC | Yes | Yes |
| Can upload maps | Yes | No |
| Has trackback mode | Yes | Yes |
| Is compatible with Windows | Yes | Yes |
| Is compatible with Mac OS X | Yes | Yes |
| has an external memory slot | No | No |
| Compatible with smart scales | Yes | Yes |
| has a battery level indicator | Yes | Yes |
| Provides the sunrise/sunset time | Yes | Yes |
| has a socket for a 3.5 mm audio jack | No | No |
| Informs about the risk of thunderstorms | Yes | Yes |
| Compatible with external heart rate monitors | Yes | Yes |
| Has a wind speed sensor | — | No |
| App & Software | ||
| Ad-free | Yes | Yes |
| Free app | Yes | Yes |
| Tracks BMI | Yes | Yes |
| Has coaching | Yes | Yes |
| Includes maps | Yes | Yes |
| Supports routes | Yes | Yes |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has live tracking | Yes | Yes |
| Has exercise diary | Yes | Yes |
| Predicts ovulation | Yes | Yes |
| Can be personalised | Yes | Yes |
| Has weight tracking | Yes | Yes |
| Predicts start date | Yes | Yes |
| Tracks water intake | Yes | Yes |
| Has inactivity alerts | Yes | Yes |
| Has period notifications | Yes | Yes |
| Has temperature tracking | Yes | Yes |
| Doesn’t require account | No | No |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | Yes |
| Counts how many calories you've burned | Yes | Yes |
| Activity tracking | ||
| Measures pace | Yes | Yes |
| Tracks distance | Yes | Yes |
| Tracks elevation | Yes | Yes |
| Designed for golf | Yes | Yes |
| Tracks your sleep | Yes | Yes |
| Tracks steps taken | Yes | Yes |
| Designed for diving | No | No |
| Has a route tracker | Yes | Yes |
| Has exercise tagging | Yes | Yes |
| Has multi-sport mode | Yes | Yes |
| Tracks calorie intake | Yes | Yes |
| Provides sleep reports | Yes | Yes |
| Detects activities automatically | Yes | Yes |
| Has a stroke counter for swimming | Yes | Yes |
Wrist Fit
Garmin Fenix 7 Pro Solar
Sits best on wrists ~49–67mm wide (≈ 13.1–17.9cm circumference).
Garmin Instinct 3 Solar Tactical Edition 45mm
Sits best on wrists ~47–64mm wide (≈ 12.6–17.1cm circumference).
2D Dimension Schematics
Accurate scale drawings based on case dimensions. Drag to pan, Ctrl+scroll to zoom. Works for every watch regardless of photo availability.
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Frequently Asked Questions
Is the Garmin Fenix 7 Pro Solar bigger than the Garmin Instinct 3 Solar Tactical Edition 45mm?
The Garmin Fenix 7 Pro Solar is bigger — 47mm vs 45mm case width.
Which fits a smaller wrist better, the Garmin Fenix 7 Pro Solar or the Garmin Instinct 3 Solar Tactical Edition 45mm?
The Garmin Fenix 7 Pro Solar suits wrists around 49–67mm wide, and the Garmin Instinct 3 Solar Tactical Edition 45mm around 47–64mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Garmin Fenix 7 Pro Solar and Garmin Instinct 3 Solar Tactical Edition 45mm side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.
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