The O'Clock watch is a silicon timepiece that is produced in Italy. It comes in 3 sizes (small, medium & large) so it comfortably fits virtually anyone and it's water resistant so feel free to jump in the shower with it!

It's a personal preference whether you want to wear it fitted like a standard watch or loose like a bracelet. The sizes measure as follow:

Small - 6 inches
Medium - 7 inches
Large - 7.8 inches

If you're buying it as a gift a general guide would be as follows:

Small - 150lbs or less*
Medium - 150 - 195lbs*
Large - 195lbs +*

Note: This is a general estimate, using wrist measurements is obviously more accurate.