Adorable infant costume. Worn once. Legs have snap closure for easy diaper change access. Headband has Velcro on both sides for safety but the Velcro doesn’t make it adjustable. It was a little tight on my little karate kid so I removed the stitching that attached the ends together in the back and used a safety pin to close (see pic). Could be tied or stitched to customize fit for your karate kid.