Tutus are made with stretchy crocheted tops (8" not lined for the smaller 0-5 year old size, and 10" lined for the 6-15 year olds), grosgrain ribbon, satin or crochet roses and fleece or felt for the designs on the front. The tops stretch a lot. The smaller ones can fit around 20+inches while the larger ones can fit around 30+ inches which will fit great over onesies, t-shirts, leggings, sweaters, and snowsuits when wearing the tutu while trick or treating. 
Most tutus come with a matching headband or hair bow. The headbands are made out of the same soft crocheted material as the top and the bows are the same grosgrain ribbon as the bac