It is stretchable at back for a perfect fit.
Hand wash with cold water only.
Material: Polyester + Lace
2-3 years: chest:52cm, length:64cm.
3-4 years: chest:54cm, length:66cm.
4-5 years: chest:56cm, length:69cm.
5-6 years: chest:58cm, length:72cm.
7-8 years: chest:60cm, length:76cm
Please allow 2-3 cm difference due to manual measurement. Besides different computers display colors differently, the color of the actual item may vary slightly from the below images, thanks for your understanding(1 inch = 2.54 cm)