This is made for babies 0-6 months to prevent and correct flat or uneven head shape. It has 4 layers to fit your babies head accurately. Layer 1 for 13-14.5", layer 2 for 14.6-16", layer 3 for 16-17.5", and layer 4 for 17.5-19". Has some red markings on back of base from storage and some slight blemishes on the size 1 pad. Looking for a quick sale, send offers! bundle and save