The best way to transform your costume is to add jewellery. Costume jewellery is brilliant, inexpensive, and makes your costume that little bit more special. We love our Sheriff badge for police costumes and our dog-tags for army costumes. One of the most vital aspects to a 20s Flapper girl costume is long beads that end around your belly button. It's all up to you, so if you scroll down below you'll see our full range of costume jewellery.