Pinterest. This would be for the costume for the butterfly because it's pretty and elegant.
DIY Felt Monarch Butterfly Wings, this is so adorable for a child! Just take another piece of fabric, e.g. a black one, and you could sew bat wings instead!
Butterfly cloak isis wings costume adult Monarch by CostureroReal
I love this butterfly dress on https://www.etsy.com/uk/listing/261531509/butterfly-wing-wedding-gown-custom-made
DIY Monarch Butterfly Costume by iCandy
OMG Next Year's Costume! DIY monarch butterfly halloween costume is ultra-chic
Monarch Butterfly Fairy Costume child's size 6 by FairyNanaLand
Orange Monarch Butterfly Crown - princess, fairy,forest,renaissance on Etsy, $30.00
Pick up cheap butterflies to glue on dress/pin on tutu