[THIS PAGE IS SELLING SIZE 18M] ULTIMATE UNDERWEAR UN-BOXING: This 12 pack of underwear comes in a flat box with 12 numbered windows that open to reveal a new underwear, perfect for countdowns to events and activities GREAT FOR POTTY TRAINING: Another day with no accidents calls for a new fun underwear! The toddler sized boxes include a Potty Training Goal Chart & Sticker Set Materials to help keep track of progress and success 100% COMBED COTTON: All Pairs are tagless with a brushed waistband for ultimate comfort ALL YOUR FAVORITE CHARACTERS: Elmo, Cookie Monster, and Grover in assorted prints OFFICIAL LICESENED PROUDCT: This ultimat 12-day surprise pack of undies in a box is perfect for birthdays, countdowns and everyday fun all brought to you by Handcraft