Plus-size skirt by River Island Plus, Dress it up or dress it down, Get you a skirt that can do both, High-rise waistband, Frill hem, Ruffle things up, Bodycon fit - holds you close. Now with a collection designed to fit (UK) sizes 18-28, high-street hero River Island scores major points with its plus-size range. Forget awkward-fitting fashion in perfectly cut jeans, jackets and camis.