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A group costume turns your friend group into the main event — these 10 themes work for 3-8 women and actually coordinate.
My top pick: A matching Spice Girls costume set where each friend picks a Spice — Sporty, Scary, Posh, Baby, Ginger — is the group costume that lets everyone express their personality while still matching.
1. Spice Girls Set

Each friend picks a Spice — platform shoes, Union Jack dress, tracksuit, leopard print. Shop spice girls costume set women on Amazon →
2. Powerpuff Girls Set

Blossom, Bubbles, and Buttercup — pink, blue, and green dresses. Shop powerpuff girls costume set women on Amazon →
3. Decades Theme (Each Picks an Era)

60s mod, 70s disco, 80s neon, 90s grunge — each friend picks a decade. Shop decades theme costume women on Amazon →
4. Disney Princess Set

Each friend picks a princess — Cinderella, Belle, Ariel, Jasmine, Rapunzel. Shop disney princess group costume women on Amazon →
5. Mean Girls (Matching Pink)

Pink skirts, pink tops — on Wednesdays we wear pink. Shop mean girls pink costume women on Amazon →
6. Crayon Set (Assorted Colours)

Each friend wears a different-colour crayon tunic. Simple, bright, iconic. Shop crayon group costume women on Amazon →
7. Angels and Devils Mix

Half the group in white wings, half in red horns — good vs. evil. Shop angel devil group costume women on Amazon →
8. Galaxy / Space Theme

Matching galaxy-print bodysuits or planet-themed outfits — celestial squad. Shop galaxy space group costume women on Amazon →
9. Clueless Characters

Plaid skirts, knee socks, headbands — as if! Shop clueless costume women group on Amazon →
10. Emoji Set

Each friend is a different emoji face costume — wearable reactions. Shop emoji group costume women on Amazon →
The bottom line
Spice Girls is the group costume that lets everyone be themselves while matching. Disney Princesses work for any group size, and a decades theme means no one has to wear the same thing.