| Display | 1.2-inch (30.4 mm) AMOLED touchscreen, 390 x 390 pixels, optional always-on mode; five physical buttons; chemically strengthened glass lens | 1.3-inch AMOLED touchscreen (416x416) with optional always-on mode, plus five physical buttons (Forerunner 265, 46 mm) |
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| Case | 43 x 43 x 11.6 mm; 39 g; fiber-reinforced polymer bezel; silicone strap with 20 mm quick release; fits wrists of 126-203 mm | 46.1 x 46.1 x 12.9 mm (Forerunner 265) |
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| Battery | Up to 11 days in smartwatch mode; up to 20 days in Battery Saver smartwatch mode; up to 19 hours in GPS-only GNSS mode; up to 17 hours in All-Systems GNSS mode (Garmin figures) | 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) |
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| Navigation | GPS, GLONASS and Galileo; barometric altimeter; compass; course guidance | Multi-band GPS with SatIQ technology; PacePro pacing guidance |
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| Health Sensors | Elevate wrist heart rate monitor, Pulse Ox blood oxygen, accelerometer, thermometer, ambient light sensor; sleep score, Body Battery, HRV status, respiration, all-day stress, fitness age, women's health tracking | — |
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| Sports | 25+ activity profiles including trail running, open water swimming, pickleball and tennis; adaptive training plans, daily suggested workouts, PacePro, running power and running dynamics | — |
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| Connectivity | Bluetooth, ANT+; Connect IQ store; smart notifications; Garmin Pay; compatible with iPhone and Android | — |
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| Memory | 4 GB | — |
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| Water Resistance | 5 ATM | — |
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| Sizes | — | 46 mm Forerunner 265 and 42 mm Forerunner 265S |
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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 |
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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 |
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