the back of the suit is not adjustable. the tie is sewed together and I was unable to make it tighter to fit my stepdaughter. I'm not sure why it would be stuck tied basically.Cute suit, but the top isn’t adjustable. You can tie it tighter, so I returned.This is a cute suit but the back is sewn together so you can not adjust the tightness. I was able to cut the string and re see it.Swimsuit fit as expected however when wet the mint green is see through. The pads in the top move very easily. I would return but I'm past the return window.Be aware that this is european sizing translated to american girls sizes and is NOT accurate unless your 12yo is a busty 115lb woman. I wear a size 6 and it is a perfect fit for me. NOT for my 12yo child. The bottoms are high cut, not as pictured. This is definitely not a pre-teen suitable suit!Para la niña