Device summary

Garmin

Forerunner 265S

Garmin

Forerunner 570 42mm

Full specifications

Full specifications
Basic information
Release year20232025
Starting price——
Display size1.1-inch1.2-inch
Dimensions41.7 mm × 41.7 mm × 12.9 mm42.4 mm × 42.4 mm × 12.9 mm
Weight39 g42 g
Front material——
Back material——
Display
Display technologyAMOLEDAMOLED
Resolution360 × 360390 × 390
Battery & charging
Charging standardGarmin proprietary clip / USB chargingGarmin proprietary clip / USB charging
Battery typeLithium-ionLithium-ion
Connectivity
CellularGPS / multi-GNSSGPS / multi-GNSS
BluetoothBluetoothBluetooth
NFCYesYes
Build & durability
FrameFiber-reinforced polymerFiber-reinforced polymer; aluminum bezel
Ingress protection5 ATM5 ATM

Key differences

The most meaningful measured gaps in size and weight — not an overall winner.

  • Weight

    Forerunner 265S

    3 g lighter · minor difference

  • Height

    Forerunner 570 42mm

    0.7 mm taller · minor difference

  • Width

    Forerunner 570 42mm

    0.7 mm wider · minor difference

  • Thickness

    Very similar thickness

What these size differences mean

Calculated from the dimensions shown, rounded to 0.1 mm and 1 g. Percentages use the smaller measurement as the reference. Fold and rotation settings affect the dimensions compared.

  • Forerunner 570 42mm is 0.7 mm (1.7% relative to Forerunner 265S) wider. Check this difference against the width of your current device and pocket opening.
  • Forerunner 570 42mm is 0.7 mm (1.7% relative to Forerunner 265S) taller. This describes the body outline; screen diagonal alone does not tell you the overall size.
  • Both have the same listed thickness (12.9 mm) at the displayed precision. Cases and camera protrusions can change the clearance you need.
  • Forerunner 265S is 3 g lighter. This is the listed device-weight difference, not a measured comfort rating.

Use these figures to compare physical size. They do not establish one-handed reach, pocket fit, durability or an overall winner.

Sources and measurement notes

Sizometry compares published specifications and calculates differences. These are not hands-on measurements or tests of comfort, performance or pocket fit.

Check the exact model, year, region and configuration on the linked page. References may cover several variants. Folded and unfolded dimensions differ; cases and camera protrusions may change the space a device needs. Drawings share a relative scale and are not calibrated to life size on your screen.

Forerunner 265S vs Forerunner 570 42mm Size Comparison