As scores of academics and feminists have pointed out before me, body image is a tricky thing. When I weighed 170, I never really knew what I looked like, sizewise (actually, I have trouble with that these days as well). Mirrors lie, your relative happiness or unhappiness with your situation can make you more or less attentive to your appearance.
Luckily, photographs can help put things into perspective. Although it isn't pleasant for me to post this, I think it's important for me to remember where I came from when I start to get angry with myself for gaining a pound or missing a workout.
This photo was taken in the summer of 2001, about 6 years before I got serious about being fit.