The mannequin's head circumference is 52 cm. It's a good size for petite adults and kids. For reference, I'm 150 cm tall, and it fits me perfectly. The material is polyester, and it's a square knit, but when you put it on, you can make nice cat ears ^-^ It's very cute(^^) Other colors available are gray and lime green♪ This is handmade by an amateur, so please refrain from purchasing if you are looking for perfection or are overly sensitive. Thank you for your understanding m(_ _)m #CatEarKnitHatPetiteSize