This a brand new without tags and in pristine condition RAD SWIM Brighton Reversible Tankini in a teen size 12 equates to an XS in adult. This darling tankini is basically four swimsuits in one (see the variations below). In our opinion, it is as cute as swimsuits come. The top has an added layer inside with sewn-in padding for worry-free play all day. We tested the fabrics in the salty ocean, sandy beaches, pools, and hot-tubs. It is high-quality, comfortable, and SO much fun!! Truly, a combination you won't want to live (or swim) without ;). Details: NWT Brighton Reversible Tankini (Top and Bottoms) Tween Size 12/ Adult XS High-waisted reversible bottoms V-neck top with flattering cinched ruching Sewn-in padding Criss-cross adjustable back straps High-quality double fabric Full Coverage Fits true-to-size