Size is 38 C, I cut the tag so I didn't see white through the mesh! It's a really thin, stretchy mesh bra with adjustable straps. It does have underwire at the cup but is still very comfortable! Materials: 79% Nylon/21% Elastane If you want to see the full listing, here is the link from where I purchased- https://shopcuup.com/products/the-plunge-mesh-black?variant=13628987342914