I purchased the large purple and red rose dresses for both my oldest (9 years old) and youngest (7 years old) daughters.  My daughters normally wear a 9/10; however, I purchased size 11/12 since my daughters are very tall/slim and so that the dresses have room for growth (currently below knee length).  Although the dresses are a bit bigger than their normal size, they still fit very comfortably and are my daughters' favorite dresses to wear.  My daughters received many compliments and I would highly recommend these beautiful and classy dresses.