Spooktacular Creations George Washington Costume for Kids, Colonial Boys Costume with Wig and Hat for Halloween DressUp Party

My son is husky but fits into a size 18/20? does this run small? big? i’m wonder if this will fit him or if i should look into a men’s small?

Does it have a wig

Super wrinkled! How do I get them out without melting the fabric??

Removing wrinkles? Ironing would ruin it and the costume would be destroyed in the dryer.