39-35-42 (I know. I have no waist.)

According to sizing charts, I am a 14 or a 16. But I wear 10s and 12s. They fit. 14 pants look like BF jeans, and keep sliding down.

This is an old problem. I was a bridesmaid for a friend way back when. They asked for my measurements, I sent them (I had moved away) and when I got to town for the wedding, the dress had to be taken in, big time. Everybody else's fit just fine.

I can't figure out what's going on, but this is another thing that makes me very, very nervous about ordering clothes from catalogues or online. Am I the only one? Should I just start pulling on the measuring tape till I'm squeezing out on either side?