| Alexanders Costumes | | Costumes, masks, props, make-up, wigs and hats for all occasions. Most are in adult sizes. There are a few children's costumes as well. |
| All Dressed Up | | Costumes, make-up, prosthetics and theatrical supplies. |
| Annie's Costume & Magic | | Holiday, magic and general costumes for adults, children, and pets. Masks, accessories and props. |
| Boston Costume Company | | Large selection of holiday, animal, and professional costumes for use in events and filmed productions. Rentals in stock, products for sale, map and directions, and links. |
| BuyCostumes | | Costumes for adults, kids and pets. Large selection of Halloween costumes and accessories. |
| Cindy Makes Things | | Sculpting and casting character heads, precisely duplicating artwork to costume form. |
| Clicket | | Costumes for almost any event; will ship worldwide. |
| Clickit | | Costumes for both adults and children. Includes toddler costumes and some plus size costumes. |
| Cosmic Outfitters | | Offering costumes for men, women and pets, including plus sizes and santa suits. Also offers beachwear and sandals. |
| Costello and Sons | | Variety of styles and designs manufactured for any garment you require. |
| Costume and Magic | | A full line of children and adult costumes, wings, crowns, wigs and specialty items, and magic. |
| Costume Gallery | | Costume manufacturer for dancers, skaters, gymnasts, and drill team members selling only to dance and gymnastic school owners and certain public and private nonprofit organizations. |
| Costume Shop.com | | Costumes for all occasions such as Halloween, Renaissance, period, theater and accessories. |
| Costume Universe | | Offering costumes, masks, make-up, prosthetics, hats, and wigs. |
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