It's time to revamp your wardrobe and choose dresses that make you look stylish no matter what your shape -- tomato, pear or potato. Makers of the Wonderbum dresses have decided that women's bottoms now come in four shapes - the pear, tomato, potato or nectarine. The Tomato: Plump, round and squishy to the touch, the tomato is fast becoming the norm. It sits best in a tight structured dress, which has a firming effect. The Potato: The second most common shape, this wide bottom is probably the least fortunate; lumpy in parts, it needs careful dressing and attention. A tulip-shaped shift hides a multitude of sins and will slim and elongate a wide behind. The Pear: Narrower at the top and almost twice the size at the fullest part, this is trickiest to buy for and the best tactic is a distraction. A long maxi dress detracts from the lower region and a halter neckline accentuating the shoulders balances out the bottom. The Nectarine: Full and round and pert in appearance. It stands out naturally and - lucky you - you can really show it off in a tight satin red dress. The 20-pounds Christmas dresses, created by George at Asda, cater for every shape and size, reports the Daily Mail. The brand teamed up with 'bottom expert' Dr David Holmes, a psychologist at Manchester Metropolitan University, who has already come up with a scientific equation for the perfect posterior based on shape, bounce, firmness and symmetry. "For most, however, the effect of plentiful attractive food has taken its toll and the cartoon perfection of spherical derrieres has given way to softer, rounded tomato derrieres, the wider, flatter pancake shapes and the less defined potato rears," he said. Fiona Lambert, of George, said, "Women should celebrate their shapes this Christmas. We've designed a range to suit every shape and size."