Costume Shop Finder Norwich Costume Shop Listings page. This section lists as many Costume Shops we could find in Norwich. If you are the owner of a Costume Shop in Norwich please submit your listing using the Get Listed link at the top. These Norwich Costume Shops offer costumes and fancy dress for adults or children in Norwich, including theatrical and party costumes, Halloween costumes and costume accessories. Most Costume Shops listed below also offer costume accessories such as masks, wigs, make up and props in Norwich.