Haylou Watches Under 40mm

5 Haylou models with a case width between 0mm and 40mm — compact sizing that suits smaller wrists and dressier looks. Each links to full specs and a wrist-fit check.

Model	Width	Thickness	Shape
GST	35.6mm	11.7mm	rectangle
Smart Watch LS01	35.7mm	11.6mm	rectangle
LS01	35.7mm	11.6mm	rectangle
RS4	37.2mm	11.1mm	rectangle
LS02 Pro	37.7mm	10.83mm	rectangle