Shop for adult Halloween costumes and costume ideas. Huge selection of adult costumes for men and women including the unusual in hard to find styles and sizes. We have more adult costumes than anyone. So, I’ve rounded up 44 homemade Halloween costumes for adults. P.S. Check out 29 more adult Halloweem costume ideas and 29 homemade kid costume ideas! Find and save ideas about Adult costumes on Pinterest. | See more ideas about Adult costume ideas diy, DIY Halloween fancy dress and Boo fancy dress costume.