Retailer of Unique Costumes, Costume Accessories and Costume Wigs. Shop 1000's of Halloween Costumes with Fast and Free Delivery from Costumeish. Halloween costumes for your children from ages 2 to 18. We also carry a huge selection of adult costumes for all ages. If you want to dress up this Halloween or just need a costume for a party or even a school play we have the costume.