This is a child's toy and not an actual burglar-proof safe.  That said, I remember I had a similar one when I was a child and felt like the king of the world because I had my own personal safe!  My friends were always in awe as the heard the loose coins clanging around inside and then seeing the intimidating combination lock, knew that the valuables within were protected from those without the combination!  My parents always acted mystified if I asked them to try to pick the lock but the truth is it's extremely easy to open.  The combination to the safe is written on the bottom but is slightly obliterated, adding to the mystic of the toy.  It only takes a couple of turns left and one right and the door opens.  Anyway, this is a super item and a great gift idea and measures 5 3/4" x 5 3/4" x 6" high.  Please contact me if you have any questions and thank you for looking!