The best selection of Disney costumes is at disneystore.com. However there are many retailers that sell various Disney costumes. If you prefer to shop in store you can always find Disney costumes at Wal-Mart, Target, or Sears. If you want to shop online you can find Disney costumes at buycostumes.com or spirithalloween.com.
Most major costume stores sell Disney Princess costumes for children and adults. You can also find costumes at the Disney Store or at Disney theme parks.
You can find hundreds of good quality costumes at: "http://www.mrcostumes.com/". Make your child happy with the variety of costumes this website has to offer.
Shrek costumes are approved by Disney, and are licensed.
All costumes worn at Walt Disney World and the other Disney theme parks are designed by Walt Disney Creative Entertainment.
A good place to look to find ideas on how to dress up like a Disney character is on the Disney cartoon websites. There will be many images of different characters and these will give one the inspiration to see which they would like to dress up like.
Disney character costumes can be purchased through online retailers like Disney and Amazon, or in a local Disney store. Occasionally, they may also be found in local classified ads and on auction sites such as eBay.
The Disney store is a great place to start. It has a lot of great Disney character costumes around Halloween and you're bound to find Ariel. You can also check out Disneystore.com if you don't have a store near you.
The Disney store (http://www.disneystore.com/clothes/costumes/adults/mn/1000395+1000777/) sells official Minnie Mouse costumes both for adults and children. Otherwise, ebay.com also has many costumes.
Costumes that can be used for Halloween can be purchased for all of the Disney princesses. They are available for both adults and children. The princesses include: Belle, Merida and Tiana.
Cute tween costumes could be a cupcake, a pirate, or a Disney princess.
I went to Costume Express and found very cute and beautiful mermaid costumes. I might also look at artwork based off the Disney movie, "The Little Mermaid."