Size S on the Model. There is Stretch. The trousers are produced in S.M.L.XL. Wide Leg Patterned Double Kimono Set. Bürümcük Fabric is Lycra. It is a comfortable fit. We Highly Recommend You Buy One Size Smaller. Model: 51 kilos, 1.60 tall, size S. Colors are Vibrant. There is a 2-3 cm difference between sizes. We wish you pleasant shopping.