The Perry is a non-adjustable swim onesie The contemporary design includes two over-the-shoulder straps that criss-cross along the back and transition into a cut-out detail along the ribcage. Please see last photo for size chart for sizing. This is equivalent to an XS - See measurements Features: Good for: Swimming, water polo, lifeguarding, paddling, ocean and pool activities Fixed-Back one-piece swimsuit UPF 50+ Unpadded Lined for maximum privacy Tagless for maximum comfort Chlorine proof 2-way stretch Reinforced stitching