Summary: I bought this watch for my grandson - the first one the glass cracked very quickly which was replaced speedily. The next one the battery didn't last very long at all and I have subsequently found out the battery is almost 3 times the cost of the watch. Very disappointed in this product and my grandson is very upset as he loves it and was keen to learn the time from it. Unfortunately I have already bought another one for his brother - lets hope 3rd time lucky.
Summary: Details state this is 30mm, i would say it's only just over 20mm if that. Brought for an eleven year olds birthday but suited for younger kids or girls only IMO. Also you get what you pay for but packaging is a plastic bag so if your thinking of buying as a present beware.