Ok so. I was in a friend's wedding last year. Here's me:
Hideous dress, I know. And an awful style for me to begin with. Anyways. The dress wasn't ridiculously tight or anything, but it fit. It stayed up.
I am moving out tomorrow and I found the dress in the floor of my closet (that's how much I liked it, obviously...) and of course I tried it on just for kicks... NOW I CAN FIT MY WHOLE ARM INSIDE THE DRESS WITH ME.
The thing does NOT stay up AT ALL.
Sorry to blind you all with my arm flab, but it amused me.