Garmin Watches Under 40mm

19 Garmin models in the 0–40mm range, actually measuring 15mm to 39.5mm. Compact sizing that suits smaller wrists and dressier looks.

Thickness is where they separate: 9mm to 217mm. That 208mm gap decides whether a watch slides under a shirt sleeve.

10 are round and 9 rectangular — at the same nominal width, a rectangular case covers noticeably more wrist.

Releases run from 2015 to 2026, so this mixes current models with older references.

Under 40mm 40–44mm 44mm & Larger

Which of these fits your wrist?

Flat wrist width55.0mm

Roughly a 14.7cm wrist circumference — the measurement a tape gives you. Compared against lug-to-lug where we have it, case width otherwise.

18 of 19 models sit on this wrist without the lugs hanging over the edge.

Model	Your Fit	Width	Thickness	Shape
vívosmart® 4	Roomy22.3mm clear	15mm	197mm	rectangle
vívosmart® 5	Roomy22.1mm clear	19.5mm	217mm	rectangle
CIRQA Smart Band	Sweet spot4.0mm clear	27mm	9mm	rectangle
vívoactive® HR	Overhangs1.0mm over	30.2mm	13.5mm	rectangle
Lily® - Classic Edition	Roomy10.3mm clear	34.5mm	10.15mm	circular
Lily® - Sport Edition	Roomy10.3mm clear	34.5mm	10.15mm	circular
Forerunner® 25	Balanced5.5mm clear	35mm	13.9mm	rectangle
Lily® 2 Classic	Roomy9.8mm clear	35.4mm	10.1mm	circular
Lily® 2	Roomy9.8mm clear	35.4mm	10.1mm	circular
Approach® S10	Balanced7.1mm clear	35.5mm	11.3mm	rectangle
Forerunner® 30	Balanced7.1mm clear	35.5mm	13.3mm	rectangle
Forerunner® 35	Balanced7.1mm clear	35.5mm	13.3mm	rectangle
Venu Sq 2 Music Edition	Balanced7.2mm clear	37mm	11.1mm	circular
Venu - 40.6mm · Music Edition	Balanced7.2mm clear	37mm	11.5mm	circular
Venu - 40.6mm	Balanced7.2mm clear	37mm	11.5mm	circular
Approach® S20	Sweet spot3.7mm clear	37.4mm	11.3mm	rectangle
Lily 2 Active	Roomy8.5mm clear	38mm	11mm	circular
vívomove® 3S	Balanced8.0mm clear	39mm	10.9mm	circular
Forerunner® 45S	Balanced7.8mm clear	39.5mm	11.4mm	circular

Same size, other brands

The middle of this group sits around 36mm. These are the closest matches we hold from other brands — useful when the size is right but the Garmin isn't.