4/3mm Women's O'Neill PSYCHO ONE Fullsuit 10T. I usually wear a size 6 in clothing. Made with unparalleled premium lightweight TechnoButter 3 neoprene, this fullsuit is flexible and durable. The TechnoButter Firewall in the chest, back, and legs is a heat retaining thermal layer for serious warmth and comfort during cool to cold water temp adventures. Other features include: a Z.E.N. back zip closure that has a free-floating zipper panel and anti-flush barrier with a drain hole to keep you warm and unrestricted, durable sealed seams with liquid Fluid Seam Weld external seams to prevent water from seeping in, a double seal collar for comfort, Krypto knee pads, and Plasma wrist seals. Only worn a few times. Sadly I moved from CA, so no more surfing for me :(