Nishimatsuya Baby Sleeper with Sleeves This fluffy and warm sleeper is made of 100% polyester. It was very useful to put on over pajamas on cold mornings. The color is white with a cute gray character! The tag says the size is 35 x 50 cm, but honestly, I'm not sure which part of the sleeper that refers to. When I measured it, the length was 46 cm and the width was 33 cm. Since it's a sleeper, it can be a little big and can be used for several years.