This is dancewear at a price lower than you'll find in a dancewear boutique.
Capezio and Danskin are two popular brands for dancers, but the unseamed versions of footless tights from these dancewear makers can double as everyday tights.
You can find entire stores, both online and brick-and-mortar, devoted to ballroom dancewear.
Here are some sites to consider for your plus size dancewear.
Rivers Edge Dancewear offers made-to-order plus size tutus, swing skirts, wrap skirts, liturgical skirts, and character skirts.