Halloween costumes and party supplies online store
(Mon - Fri 9am - 5pm EST)
Welcome to the world's largest Halloween costume store! Over 15,000 items. Great prices. Fast delivery
Costumes and masks
Mermaid
Under the sea is a world more enchanting and diverse than ours. Sparkle and stand out at the next costume party with any of these Mermaid costumes. CostumeParty.com also supplies Mermaid-themed party supplies and decorations to give your little girl a magical party to remember. Grown mermaids will look beautiful in costumes like the Mesmerizing Mermaid, Mermaid Elite, Disney’s Little Mermaid and several others. Let your little underwater princess shine in the Magical Mermaid for Toddlers and Girls among other costumes for kids. CostumeParty.com is your ideal source for costumes and party supplies with hundreds of items decorated after popular movie themes, characters and more.
Same day shipping
Orders placed before 12pm EST will be shipped the same business day
Shop By Theme
Looking for a theme for your costume party? Are you invited to a theme party and don't know what to wear? Browse costumes and party supplies by theme. Browse themes »
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