Plus-size dress by River Island, Easily dressed up or down, Crew neck, Short sleeves, All-over print, Thigh split, Regular fit, Just select your usual size. River Island takes you from the party to the after party with its fashion-forward styles. Look out for its standout party dresses, feminine details, statement jackets and cool denim including skinny-cut jeans and cute denim shorts, which sit alongside its directional footwear and swimwear ranges.