Plus-size top by Oasis, For your daytime thing, Round neck, Floral print, Tie front, Contrast trims, Button-keyhole back, Regular fit, Just select your usual size. Opening its first store in 1991, Oasis has gone on to become one of Britains most popular high-street brands. Expect vibrant prints and plenty of colour across a collection of dresses, tops and tailoring, plus bags and shoes for all your accessory needs the add-to-bag potential is real.