Childs Official Super Mario Luigi Hat & Moustache Fancy Dress Accessory Set USA Size - OS

Q: will this fit my nephew, he is just turning two but he is quite small, so I'd say 18-24months ?

Hi,Thank you for your inquiry. The Kid Luigi and Mustache Set has only one size. This item may bit a little bigger for you nephew but don't worry he will enjoy using the hat.If you still need more assistance, please don't hesitate to contact us again.Have a great day!Sincerely,JeffreyCustomer Care Representative