Hand-picked Japanese cotton/linen fabric. Custom-made oak wooden button. Wear a triangle bandana or a fold & tie. 80% Cotton, 20% Linen Made in South Korea CARE INSTRUCTIONS Machine wash cold Dry flat Do not bleach Do not dry-clean SIZE GUIDE It is most accurate to measure the furry folks while standing upright. Step 1. Neck: measure the thickest part of the neck circumference. Small: up to 9 in-12 in neck circumference Medium: up to 12 in-18 in neck circumference Large: up to 17 in-22 in neck circumference All products are handmade, and sizes may vary slightly.