I think this can be worn for a long time, from baby to child ˚✧ It was only worn for a short period, so it's in very good condition. There's no tag, but I think it was a cottoli sleeper from Birthday m(._.)m My daughter wore it around the age of one, it was like a warm vest that covered her knees! Size: 35 x 50cm Multiple purchases are welcome! This is a used item inspected by an amateur, so please refrain from purchasing if you are concerned (´-`)