This is a very cute handmade付け襟 (tsuke-eri, detachable collar) perfect for everyday wear! It's made with a soft and durable yarn of 75% merino wool and 25% nylon, but please be careful if using it on newborns or those with sensitive skin. For care, hand washing in lukewarm water is possible! When drying, lay it flat to prevent stretching (*ˊᵕˋ*) The neck circumference is about 31 cm, and the width is about 11 cm. Regarding the neck circumference, since it's made of yarn, you can stretch it a little if needed (*ˊᵕˋ*) The colors are photographed to be as close to the real thing as possible, but please understand that there may be some variation due to lighting conditions m(*_ _)m