NiidorSticky Bra Women's Strapless Backless Invisible Push up Silicone Bra with Nipple Covers

If i’m a 36c should i go with the c cup or get d?

Will this work for a 34 DD?

Is it possible to order a different color? It seems like I am only able to order the lightest color of the three options.

Iam a 38C would a C cup fit me well ??