I bought this from a Betsey Johnson outlet in 2012, and need to send it to a new home as I have outgrown it. (Would love to trade for same in a M/L, but I know that's unlikely. Seems to be rather rare.) It is in great used condition, is made out of a heavy-weight t-shirt-like fabric (95% cotton, 5% spandex), so it does stretch some. The boning is thin plastic, so don't expect this to do the work of a real corset. It's more like a corset-style large belt. The buckles on the side are largely decorative, but you can adjust them; they just won't do much to expand or contract the size. The laces in the back are like a very soft shoelace. It's very comfortable and very cute! Again, do not expect this to hold you in. It's got a great goth/punk/industrial vibe to it, but the main closures are snap buttons. Measurement right under the bust is 13" across, without stretching and with the laces closed (as shown) Measurement across the smallest part of the waist is 12" across, again, without stretching and with the laces closed. The laces are long enough that you can open up the back 1-2 inches, so it can fit up to a size 26" waist. The laces aren't long enough to open it up more than that.