My perfect summer skirt is knee length, fitted from the waist to hips then flares out and is full enough to cover my legs sitting cross legged on the grass. It’s also long enough so that I don’t have a bare skin sticking to plastic seat issue when it’s hot.
All I’ve seen are minis and maxis. A lovely MNer found me a perfect skirt a couple of years ago, and I lived in it last summer, but I’d like a spare!