Embellished Bandeau Cowl Neck Maxi Dress in Light Blue 10 Oh Polly Vertical Striped Dress This blue and white striped dress, made from pure cotton and trimmed with lace, is as cheerful as a summer's day. The collar, belt and integrated welt pockets create a horizontal accent. I remember one time someone told me they don't wear horizontal stripes, only vertical stripes because it's more slimming. So now every time I see a vertical striped dress, I always grab Glassworks London Navy Blue And White Vertical Stripe Tie Waist Dress