I just got my 997 in the mail the other day. I used to wear large ones because I was at the lower end of large. Between weight loss and fat redistribution my chest has gotten smaller. I used to wear a medium 997 a long time ago. I don't feel like the new medium one is tight enough. Usually they are hard to get over my head when they fit. This one is pretty easy.

Has the sizing changed? Am I thinking incorrectly because it's been a long time since I bought a new binder that fit?

I think its changed, or the material has. I have a binder I bought like over a year ago and a donated binder that are both size small and the newer donated one seems loose to me.

If the donated one had been previously worn that'll be why it's looser, not necessarily the original size or materials being different. They stretch out with use.

I think underworks did change their sizing. I had a white Tri-top I bought almost 2 years ago and I recently bought another one a few months ago. The new one is black and is a little smaller in size. I think the old one has stretched a bit, but it was still bigger then the new one.

I was thinking the same thing... I bought a medium 997 recently and it was too big, had to exchange for a small. The small is better but I still wear another binder over it so I'm thinking I should've gotten a model that runs smaller. I've lost weight too but yeah there's something up with their sizing.