| Sizes | 46 mm Forerunner 265 and 42 mm Forerunner 265S | — |
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| Display | 1.3-inch AMOLED touchscreen (416x416) with optional always-on mode, plus five physical buttons (Forerunner 265, 46 mm) | 1.3" (43mm) 432x432 / 1.5" (47mm) 480x480 Super AMOLED, sapphire crystal, Always On Display, 2,000 nits peak |
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| Case | 46.1 x 46.1 x 12.9 mm (Forerunner 265) | 43mm: 42.5 x 42.5 x 10.9 mm, 52.0 g / 47mm: 46.5 x 46.5 x 10.9 mm, 59.0 g, rotating bezel |
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| Battery | Up to 13 days in smartwatch mode (up to 15 days for the 265S); up to 20 hours in GPS mode (24 hours for the 265S) (Garmin claims) | Up to 40 hours (Always On Display off) / up to 30 hours (on); 300 mAh (43mm) / 425 mAh (47mm) |
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| Navigation | Multi-band GPS with SatIQ technology; PacePro pacing guidance | — |
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| Storage | Up to 8GB for music and data; Spotify, Deezer and Amazon Music downloads (subscription required) | — |
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| Training | Training readiness, morning report, daily suggested workouts, Garmin Coach, VO2 max, running power and running dynamics | — |
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| Health | Wrist-based Pulse Ox, Body Battery, sleep score, HRV status, stress tracking, menstrual cycle tracking | — |
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| Features | Garmin Pay, smart notifications, incident detection and LiveTrack | Sleep coaching, body composition, ECG and blood pressure (select markets, Samsung phone), irregular heart rhythm notification, skin temperature, fall detection, Samsung Wallet |
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| Durability | 5 ATM water rating | — |
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| OS | Garmin firmware; pairs with Android and iOS through the Garmin Connect app | Wear OS 4 (Wear OS Powered by Samsung), One UI 5 Watch |
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| Chipset | — | Exynos W930 dual-core 1.4GHz |
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| Memory | — | 2GB RAM + 16GB storage |
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| Water Resistance | — | 5ATM + IP68, MIL-STD-810H |
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| Sensors | — | Samsung BioActive Sensor (optical heart rate, electrical heart signal, bioelectrical impedance), temperature, accelerometer, barometer, gyro, geomagnetic, light, 3D Hall sensor |
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| Connectivity | — | Bluetooth 5.3, Wi-Fi 2.4+5GHz, NFC, GPS/GLONASS/BeiDou/Galileo, optional LTE |
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| Compatibility | — | Android 10 or higher with more than 1.5GB of memory |
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