Size 6M, 67cm. I folded the sleeves to fit my child in 6M size, so if I extended the sleeves, they could still wear it around 12M. It's made of double-layered fabric, so it's a bit thick. There's only one button at the top, so it doesn't seem to hurt even when lying on their stomach, and it's easy to put on, so it was very useful. Set of two. Slight signs of use. The pink one has a faint stain on the back. Please understand that these are used items. Individual sales are also possible. Twins