| Monster Makers | | For Do-It-Yourself Monster Makers ranging from amateur hobbyists to professional SPFX artists; supplies for use in Film, TV, and Haunted House productions. |
| Murielle Roy and Co | | Specializes in fabric and trim for performers. Samples, size, and color charts. |
| Old Schoolyard | | UK company supplying British school uniforms for adults. |
| Ostriches Online | | Features a selection of feathers, boas, fringe, fans and theatrical and costume accessories available. |
| Party Props | | Products include Halloween and Renaissance costumes and accessories. |
| Ronjo | | Costumes, wigs, character props and makeup for parties and special events. |
| SandW Costumes | | Custom designed garments and costumes for stage and special occasions. |
| Sarah A. Iams | | Costume designs for Theater, Opera, and other venues. Includes Photos and sketches. |
| Satin Apple | | Offers costumes, accessories, mascots, and vintage reproductions. |
| Scary Faces | | Halloween costumes, masks, props and accessories. |
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