I just measured my belly the other day, for the fun of it - at about 38 weeks. I figured this is one time when I really don't care what the measuring tape says, so I might as well go for it! Over the fullest point, it's 42 inches, which is an increase of about 10 inches for me. (105cm, up 25cm, if my math is correct.) People generally say I don't look very big at all, but I think it's partly because I have a bigger frame and full bust (also about 42 inches), which makes the tummy look a little smaller in proportion.
So what's your tummy at? Anyone feel like sharing?