Sonic Generations Knuckles The Echidna - Small Polyester Sonic Generations Knuckles The Echidna - Small Jumpsuit and mask Complete economy costume all in one package Have a gaming party, trick-or-treat or just dress up for play time Child's size Small fits most 3 to 4 year olds, 44" to 48" tall Since 1950 Rubie's Costume Company has been making dress-up fun with costumes and accessories for the entire family