These are websites I recommend for mermaid cosplays and wigs. Whether you are dressing up for a photoshoot, mermaid meet, cosplay, Halloween, or a gig here are some good listings!
They got some cute mermaid costumes and accessories for all ages
Mermaid Costumes for Adults & Kids - Spirithalloween.com
I bought an official king triton trident and a Vanessa costume here. They are great quality and great prices!
Halloweencostumes.com
Amazon has some good quality Ariel cosplays. Take a look at photos and reviews before purchase
Amazon.com Ariel Cosplays
LydiaCosplay on etsy sells some beautiful Ariel cosplays. They are made to your size
LydiaCosplay - Etsy
Molly Nguyen makes one of the most gorgeous Ariel cosplays. It's on the pricer side, but they are worth it based on other customers
Etsy - Molly Nguyen Design
Amazon has some great quality lace fronts. I suggest lace fronts so it blends in with your hairline better
Amazon.com Wavy Lace Front Wigs
Lots of affordable options in a variety of styles and colors
Epic Cosplay Wigs - USA Wig Store - Cosplay Wigs - Anime Wigs ...
They got wigs for regular use and cosplay use!
Wig Is Fashion - Wigs & Fashion All In One!
Lots of long and wavy wigs here that would look great for a mermaid-look!
CLASSIC Long Wigs - Arda Wigs
Finfolk often pair their tails with wigs from Pose Wigs. However, these wigs can be used for whatever tail brand or occasion!