I'd never pay the $$$ they're asking on Etsy, but a homemade version would work nicely as a costume alternative for a teen or adult who doesn't want to totally dress up for Halloween or the trunk or treat.
DIY Tutorial: DIY HALLOWEEN COSTUME / DIY Princess Dress-up Apron - Bead&Cord
DIY Snow White costume shirt. Would be great to make one to wear at Disney World instead of wearing a hot, itchy costume :)
Princess Rapunzel Costume T-Shirt Made to Order. $25.00, via Etsy. I love the idea of converting a t-shirt and adding a skirt to make an awesome Disney princess costume.
My talented & crafty friend's home-made Rapunzel shirt!