I love graphs, I've said it before, but they are so good at quickly demonstrating things.
When I started 6 weeks ago my belly was 111cms (43.5"), it's now down to 102cms (40"). Luckily I have a few belts to keep my trousers up as I'd started to look like a youth, with my boxers showing all the time!
I try to measure myself every day, but at minimum once per week.