BOOMBA Ultra Boost Inserts in Sand, Size E fits bra sizes 30G, 32F, 34E, 36D, 38C, 40B The set is new, open box, and comes in its original BOOMBA box, with the inserts individually wrapped in protective plastic. The most padded insert on the market. The go-to for that wow factor. Instantly boost up to 2 cup sizes. Recommended for tops with structure in the chest area. For the perfect fit, we recommend choosing your true size. Only size down if you are in between sizes.