Plus-size dress by Oasis, Say it with flowers, V-neck, Flutter sleeves, Wrap design, Tie waist, Regular fit, A standard cut for a classic shape. 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.