Haylou Watches Under 40mm

5 Haylou models in the 0–40mm range, actually measuring 35.6mm to 37.7mm. Compact sizing that suits smaller wrists and dressier looks.

Thickness barely moves across the group — 10.8mm to 11.7mm — so these wear much alike under a cuff.

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.

5 of 5 models sit on this wrist without the lugs hanging over the edge.

Model	Your Fit	Width	Thickness	Shape
GST	Balanced4.6mm clear	35.6mm	11.7mm	rectangle
Smart Watch LS01	Balanced7.1mm clear	35.7mm	11.6mm	rectangle
LS01	Balanced7.1mm clear	35.7mm	11.6mm	rectangle
RS4	Balanced4.9mm clear	37.2mm	11.1mm	rectangle
LS02 Pro	Sweet spot3.5mm clear	37.7mm	10.83mm	rectangle

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 Haylou isn't.