French ToastGirls' Two-Tab Pleated Scooter

What is the length of the skirt for color: grey size: Big Girls 12

I am trying to buy a plaid skirt for a halloween outfit. if i am 5'3 and 140lbs would this skirt work for me if i ordered the larger size?

Are there shorts attached to the skirt?

What's the difference between a 12 and a 12 plus?