Shefit active skirt women’s large *runs small*

NWT shefit women’s active skirt Bought online but only sized up one instead of 2 like the site recommends. Size is large, but I would say fits like a 6. Here are the details from their site: A throwback to your cheer days, you’ll feel totally confident and unencumbered in this pull-on skirt and wardrobe-stretcher that’s just right for all kinds of activities like walking, running errands or tennis. Runs small. We suggest sizing up one to two sizes.