Plus-size dress by River Island Plus, Polka-dot print, Hits the spot, Cut-out V-front, Cold-shoulder design, Frill trims, Zip-back fastening, Regular cut, Fits you just right. 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.