How many centimeters did your baby belly measure at 24 weeks?

I went to the doctor yesterday and he measured my baby belly at 29 centimeters (from pubic bone up). I will be 24 weeks along tomorrow, but he said "wow... you are measuring really big" then he measured again to make sure he wasn't wrong. I was just curious what the normal measurement should be around 23 or 24 weeks. My husband is a bigger guy, so we expected a bigger baby boy... but when the doctor says "wow", and then double checks it makes you a bit apprehensive. =)