Flared skirts or pants are wider at the bottom or at the end of the legs than at the top.

Is flared skirt formal?

Medium Flared Formal Skirt:

They can be knee-length, calf-length and ankle length. A special feature of wearing these skirts is that they add an atmosphere of height to the body. Depending upon the material used, they can be dressy, semi-dressy or formal.

What are the poofy skirts called?

Bubble skirts are also called puffball skirts because of their shape. They're also called harem skirts.