"The online description of sizing is a bit off on this costume. When trying to order the sizes were just listed as XS, S, M, L with no other info. I used the size chart link provided and measured my daughter meticulously. I ordered the size according to the sizing chart and it was WAY off. Once I received the package I noticed right away the package lists height not any of the other measurements online. Height is important since the dress is very short. Here is the real info you need. XS is a 3-4 height of 28-32. S is a 4-6 height 32-42. M is a 7-10 height 42-49. L is a 10-12 height 50-55. Do not go by the link online. The dress skirt falls at my daughter's waist since she is tall. The costume itself is very cute. The leggings are not tight sock like but rather very loose like leggwarmers."