next 6-9mth 9.5kg This is a set of 4. Not sold separately. The white base with animal and rainbow patterns is cute. I had other rompers, and my baby grew quickly during this time, so they were used only a few times and are in good condition. Next clothes are cute and don't look like what everyone else is wearing, and the fabric is sturdy, so I often bought them. They cover the feet, so it's convenient for outings in cold weather because you don't need to put socks on.