A Polka Dot Dress: River Island Purple Spot Print Ruffled Dress It's hard not to smile looking at a polka dot dress. This River Island Purple Spot Print Ruffled Dress ($86) is one of those dresses you can wear to so many different places, and it's one you'll reach for again and again. Image Source: riverisland.com River Island Purple Spot Print Ruffled Dress $86 from riverisland.com Buy Now