Garmin Fenix 7 Pro Sapphire Solar vs Samsung Galaxy Watch8 - Wi-Fi · 40mmSize, Specs & Wrist Fit Compared
The Garmin Fenix 7 Pro Sapphire Solar is 6.6mm wider, 4.3mm longer, 5.9mm thicker and 43g heavier than the Samsung Galaxy Watch8 - Wi-Fi · 40mm. Both are circular.
Measured against the Garmin Fenix 7 Pro Sapphire Solar.
- Case width
- 47mmbaseFenix 7 Pro Sapphire Solar40.4mm−6.6mmGalaxy Watch8 - Wi-Fi · 40mm
- Lug-to-lug
- 47mmbaseFenix 7 Pro Sapphire Solar42.7mm−4.3mmGalaxy Watch8 - Wi-Fi · 40mm
- Thickness
- 14.5mmbaseFenix 7 Pro Sapphire Solar8.6mm−5.9mmGalaxy Watch8 - Wi-Fi · 40mm
- Weight
- 73gbaseFenix 7 Pro Sapphire Solar30g−43gGalaxy Watch8 - Wi-Fi · 40mm
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Garmin
Fenix 7 Pro Sapphire Solar
Samsung
Galaxy Watch8 - Wi-Fi · 40mm
Which one fits you
On wrists narrower than about 49mm, the Samsung Galaxy Watch8 - Wi-Fi · 40mm is the safer pick — it stays proportionate down to roughly 45mm, where the Garmin Fenix 7 Pro Sapphire Solar starts to hang over the edge. Above 49mm both sit cleanly, and the Garmin Fenix 7 Pro Sapphire Solar gives you more presence.
The Garmin Fenix 7 Pro Sapphire Solar wears larger than the Samsung Galaxy Watch8 - Wi-Fi · 40mm (47mm vs 40.4mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Samsung Galaxy Watch8 - Wi-Fi · 40mm is the slimmer of the two (8.6mm vs 14.5mm), so it slides under a cuff more easily.
On the wrist the Samsung Galaxy Watch8 - Wi-Fi · 40mm feels lighter (30g vs 73g, case only).
The Garmin Fenix 7 Pro Sapphire Solar is middle-of-the-pack for thickness among the 98 47mm watches in the database.
Among the 509 40mm watches we hold thickness for, the Samsung Galaxy Watch8 - Wi-Fi · 40mm is thinner than 83%, so it wears flatter than its width suggests.
Specification Comparison
| Spec | GarminFenix 7 Pro Sapphire Solar | SamsungGalaxy Watch8 - Wi-Fi · 40mm |
|---|---|---|
| Case Width | 47mm | 40.4mm |
| Lug-to-Lug | 47mm | 42.7mm |
| Thickness | 14.5mm | 8.6mm |
| Weight | 73g | 30g |
| Shape | Circular | Circular |
| Water Resistance | 10 ATM | 5 ATM |
| GPS | Yes | Yes |
| Display type | LCD | OLED/AMOLED |
| Screen size | 1.3 inches | 1.34 inches |
| Always-On Display | Yes | Yes |
| Battery life | 22 days | 2 days |
| Has wireless charging | No | Yes |
| Has a removable battery | No | No |
| Has a solar power battery | Yes | No |
| Has a rechargeable battery | Yes | Yes |
| Has a battery level indicator | Yes | Yes |
| Released | 2023 | 2025 |
Hover a row to highlight that measurement in the schematics below.
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist. Built from the measurements, so it works for every watch whether or not it has a photo.
- Garmin Fenix 7 Pro Sapphire Solar47mm · 14.5mm thick
- Samsung Galaxy Watch8 - Wi-Fi · 40mm40.4mm × 42.7mm · 8.6mm thick
Garmin Fenix 7 Pro Sapphire Solar vs Samsung Galaxy Watch8 - Wi-Fi · 40mm on a wrist
Put Garmin Fenix 7 Pro Sapphire Solar and Samsung Galaxy Watch8 - Wi-Fi · 40mm on the same arm, sized to your own wrist, and turn it. Side by side or stacked on one spot, whichever answers the question faster.
- Garmin Fenix 7 Pro Sapphire Solar — 47mm case, standing 14.5mm off the wrist.
- Samsung Galaxy Watch8 - Wi-Fi · 40mm — 40.4mm case, 42.7mm lug-to-lug, standing 8.6mm off the wrist.
Whether that clears your wrist edges is the question worth answering, and it depends on your wrist rather than on the case diameter.
See them on a wrist in 3DCase shapes are generated from each watch's published measurements — case width, lug-to-lug and thickness — not from manufacturer 3D models, so the proportions are accurate while the dial is generic.
Battery life compared
Furthest apart in Smartwatch mode, where the Garmin Fenix 7 Pro Sapphire Solar lasts 11.0× as long as the Samsung Galaxy Watch8 - Wi-Fi · 40mm (22 days against 2 days).
Garmin Fenix 7 Pro Sapphire SolarSamsung Galaxy Watch8 - Wi-Fi · 40mm
Smartwatch
22 days2 daysGPS
73 hours—Training
10 hours—
Full Specification Comparison
124 specs| Spec | Garmin Fenix 7 Pro Sapphire Solar | Samsung Galaxy Watch8 - Wi-Fi · 40mm |
|---|---|---|
| Design | ||
| width | 47 | 40.4 |
| height | 47 | 42.7 |
| volume | 32.03 cm³ | 14.84 cm³ |
| weight | 73 g | 30 g |
| thickness | 14.5 | 8.6 |
| ATM rating | 10 ATM | 5 ATM |
| resolution | 260 x 260 px | 438 x 438 px |
| screen size | 1.3 inches | 1.34 inches |
| Display type | LCD | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 282 ppi | 327 ppi |
| width of band | 22 mm | 20 mm |
| water resistance | Waterproof | Water resistant |
| Always-On Display | Yes | Yes |
| has a touch screen | Yes | Yes |
| is designed for kids | No | No |
| waterproof depth rating | 100 m | 50 m |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | Yes | Yes |
| has branded damage-resistant glass | No | No |
| maximum operating temperature | — | 35 °C |
| Ingress Protection (IP) rating | — | IP68 |
| lowest potential operating temperature | — | 0 °C |
| Battery | ||
| battery life | 22 days | 2 days |
| has wireless charging | No | Yes |
| has a removable battery | No | No |
| battery life with GPS on | 73 hours | — |
| Has a solar power battery | Yes | No |
| has a rechargeable battery | Yes | Yes |
| battery life in training mode | 10 hours | — |
| battery power | — | 325 mAh |
| 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 | No |
| 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 | 2025-07-09 |
| Has a stopwatch | Yes | Yes |
| Has smart alarm | No | No |
| warranty period | 1 years | — |
| Has call control | Yes | Yes |
| Has silent alarm | Yes | Yes |
| has HRV tracking | Yes | Yes |
| internal storage | 32GB | 32GB |
| measures VO2 max | Yes | Yes |
| Has notifications | Yes | Yes |
| Has ECG technology | Yes | Yes |
| Locates your phone | Yes | Yes |
| has fall detection | Yes | Yes |
| has voice commands | No | Yes |
| Acquires GPS faster | Yes | Yes |
| Has vibrating alerts | Yes | Yes |
| shows readiness level | Yes | Yes |
| Can be used to answer calls | No | Yes |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | Yes | Yes |
| has fast/slow heart rate notifications | Yes | Yes |
| Has a built-in camera remote control function | No | Yes |
| RAM | — | 2GB |
| Connectivity | ||
| has NFC | Yes | Yes |
| supports ANT+ | Yes | No |
| supports Wi-Fi | Yes | Yes |
| supports Galileo | Yes | Yes |
| has a cellular module | No | No |
| Is compatible with iOS | Yes | No |
| Is compatible with Android | Yes | Yes |
| Wi-Fi version | — | Wi-Fi 4 (802.11n) |
| Bluetooth version | — | 5.3 |
| Miscellaneous | ||
| Has auto pause | Yes | Yes |
| Available on PC | Yes | — |
| Can upload maps | Yes | — |
| Has trackback mode | Yes | — |
| Has a wind speed sensor | No | — |
| Is compatible with Windows | Yes | No |
| Is compatible with Mac OS X | Yes | No |
| 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 | — |
| has a socket for a 3.5 mm audio jack | No | No |
| Informs about the risk of thunderstorms | Yes | — |
| Compatible with external heart rate monitors | Yes | Yes |
| Has passcode | — | Yes |
| 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 | — |
| Has exercise diary | Yes | Yes |
| Predicts ovulation | 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 | — |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | 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 | No |
| 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 | No |
| 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 Sapphire Solar
Sits best on wrists ~49–67mm wide (≈ 13.1–17.9cm circumference).
Samsung Galaxy Watch8 - Wi-Fi · 40mm
Sits best on wrists ~45–61mm wide (≈ 12.0–16.3cm circumference).
Frequently Asked Questions
Is the Garmin Fenix 7 Pro Sapphire Solar bigger than the Samsung Galaxy Watch8 - Wi-Fi · 40mm?
The Garmin Fenix 7 Pro Sapphire Solar is bigger — 47mm vs 40.4mm case width.
Which fits a smaller wrist better, the Garmin Fenix 7 Pro Sapphire Solar or the Samsung Galaxy Watch8 - Wi-Fi · 40mm?
The Garmin Fenix 7 Pro Sapphire Solar suits wrists around 49–67mm wide, and the Samsung Galaxy Watch8 - Wi-Fi · 40mm around 45–61mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Garmin Fenix 7 Pro Sapphire Solar and Samsung Galaxy Watch8 - Wi-Fi · 40mm 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.