fairy dress costume Foaincore Women Renaissance Medieval with Flower Crown, Belt, Pouch and Elf Ears for Halloween (Green,Small) : Clothing, Shoes & Jewelry day comfort Hand DIY EASY GARDEN FAIRY HALLOWEEN

Maxi dresses can also work depending on the formality and venue

Dont forget that can be used for the Halloween costumes mentioned in this post (and year-round!) This is an affordable blue dress Black Dress Halloween Costume Ideas The black dress is a classic Halloween costume and a perennial party looks

However, you can be more liberal about showing shoulders and some of your back

Buy Women's Maxi A-line Swing Plaid Tiered Cotton Dress, Casual Lantern Long Sleeve Modest Dress Comfy Elegant Flowy Long Dresses Black and other Casual at Amazon.com

Ultimately, the key is to keep your outfit cohesive so you dont overwhelm the eye with too many colors or textures