Imagine by Rubie’s Spider-Man Into The Spiderverse Muscle Shirt Set, Small Price: $20.46 (as of 04/04/2019 14:34 PST- Details)

Officially licensed Marvel Spider-Man into the spider verse costume, look for trademark to be sure you have an authentic costume
Fiber-Filled muscle chest Spider-Man shirt and fabric mask
Available in one size, Small; designed to fit children 44 to 48-inches tall with 25 to 26-inch waist