This is a set of four short undergarments for newborns. These were worn by one child. The size is 50 cm. The green star-patterned ones from Petit Main were kept in a pouch for changing, so they weren't worn often and were only worn a few times. The sleeveless baby undergarments from Akachan Honpo were only worn for vaccinations because they make it easier to give injections. I think they are still in usable condition, but please consider that they are used items! I wash children's clothes separately from adults' and do not use a dryer! I generally plan to ship them the next day or the day after, but please understand that there is a possibility that shipping may be delayed due to a sudden fever or other issues with a small child.