WatchFitTool

Apple vs FitbitWatch Sizes & Range Compared

On average Fitbit watches run larger than Apple (40.3mm vs 36.4mm average case width), so Apple is generally the easier brand for smaller wrists.

MetricAppleFitbit
Models with size data7410
Case size range33.3–44mm38.6–42mm
Average case width36.4mm40.3mm
Smallest modelWatch Series 3 - GPS · Cellular · 38mm (33.3mm)Ionic (38.6mm)
Largest modelWatch Ultra 3 (44mm)Blaze (42mm)
Thinnest modelWatch Series 11 - GPS + Cellular · Titanium · 46mm (9.7mm)Versa Lite (11.2mm)