One size. The dress fits perfectly, wide and reaches almost to the ankles. It's full and colourful. My sister-in-law always cleans everything before she puts it on and my granddaughter doesn't wear anything until it's washed because she knows her mother washes everything. No shrinking, like everything else, and no breaks. It's roomy enough to last a long time. So glad I bought it. Also, the prices were perfect. Surprisingly in person it is really very beautiful. Poppy is of course her favorite character.