When you buy wedding dress??

How much more weight do you want to lose? Most dresses can be altered up to two sizes, and a size is about 10-15 pounds (each). So, if you have more than say 30 pounds to lose, I might pause a little bit longer until you get into alterations range.

I agree with Stacey. It depends how much you want to lose, and what kind of dress you want, as some will be harder and more expensive to alter than others.

I was in a similar boat to you - in the process of losing weight when I bought my dress. I only JUST fit into the sample dress (with some back flub and a bit too much cleavage) and so I bought the size up, just in case I didn't lose anything (because imagine the nightmare of not fitting into your dress!) Since then I've probably lost about... 13 pounds. So I might have fitted into the sample size after all, but I'm still glad I bought the one I did.

I think the only other thing is, 30 pounds is a LOT of weight to lose, and if you bought a dress too early, you might have chosen something different by the time you get to your new size and shape, so if possible I would wait until a little bit closer to your goal weight to shop.