The O'Clock watch is a silicon (stretch) timepiece that is produced in Italy. It comes in 2 sizes (small & medium) 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 follows:

Small - 6 inches
Medium - 7 inches

If your buying it as a gift a general guide would be as follows:

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

*This is a general estimate, using wrist measurements is more accurate.