Size L/XL Brown Design Corset Top

Size XL - more like a large or a medium Brown NWT - new still in bag, tried to get on once no brand, bought online size large-ish, check measurements, brown withh vintage design corset top with stretchy straps, tie up back and zipper up side to get on. no branding as I bought online. looks like it would fit a B/C cup lady. 16" p2p 6.5" across the cup 15.5" right halfway down 17" at the bottom with those measurements I would say a smaller large or a larger medium