This bracelet is made of several leather threads that wrap twice around the wrist. The hook-shaped closure that is attached to the oval is, in turn, a hook piece as an ornamental piece in itself.
The sizes correspond to the wrist circumference in centimeters.
To properly select your size, measure your wrist loosely with a tape measure. You can do it with a thread and then measure it with a ruler.
For other measures or colors check availability.