Mermaid Bikini Top Adult Costume Green - Standard This mermaid costume top includes one bikini style bra top in metallic fabric with fish scale print. Choose your sassy mermaid top from pink, blue or green. Mix and match this cute mermaid bikini top with our coordinating mermaid tails! The Mermaid Bikini Top comes in adult size Standard. The mermaid skirt, wig, glovelets and jewelry are not included with the mermaid bikini top.