PJ Mask Gekko costume made from organic cotton Lamaze long sleeve onesie, and long pants set. Comes with a custom made mask that is adjustable. Comfy green baby costume that can be used daily after! 12mos is the size but my son wore this at 6mos he was a bigger baby so any toddler in that 6-12 mos range would work. Check out my other PJ mask listings for sale will bundle