Cokos Novelty Adult Women Coronation Dress Costume is made with shirred fabric at the upper back for a good fit. Please order your Exact size because the dress is beautifully Stretchy and Elegant, and will fit a range of sizes. Size XSmall is suitable for US women size 0-2, Size S (Small) for US women size 4-6, Size M (Medium) for US women size 6-8, Size L (Large) for US women size 10-14, Size XL for US women size 16-20 and size 3XL is best for women size 20-24W plus.