Chest: Take the tape measure under her arms and go directly over the bust line. Waist: Go around them with the measuring tape right at the belly button.Some children have a slight pooch belly, so you will want to measure the widest point of where it sticks out. Length: Take the tape measure from the top of the child's shoulder to the floor. You will take the tape measure all the way down the front of her and see where it falls on the leg. For ballerina length, the dress should fall between mid-calf to ankle. Please keep in mind that most of our dresses should fall between mid-calf to ankle so looking at the length measurement is important. If you have measured your child and still have questions regarding sizing we are more than happy to help you find the best size. Please note when submitting a sizing inquiry, the information needed is: age, chest, waist, top of shoulder to floor measurement and the wear date. Please note that the assistance you receive should be taken as a suggestion only as the child is not in front of us. The item "Christie Helene UF4129S Communion Dress Flower Girl Wedding Size-6 $790" is in sale since Sunday, January 29, 2017. This item is in the category "Clothing, Shoes & Accessories\Wedding & Formal Occasion\Girls' Formal Occasion". The seller is "strcastle" and is located in Coram, New York. This item can be shipped worldwide.