Thank you for viewing from among many items. This is a set of two masks, one for toddlers to lower elementary school sizes and one for adults. The outer fabric is double gauze combined with bleached cotton, and the lining is also double gauze, allowing you to insert a filter from the side. Size (when spread out) Child size: 14cm wide, 11cm long Adult size: 17cm wide, 14cm long The masks are also designed to allow for the insertion of elastic bands. The adult mask has a nose wire to fit the face, which is removable. There may be some distortion or size errors. Please refrain from purchasing if you are concerned. I have a small dog and a cat. Please refrain from purchasing if you have allergies. Please wash the inner mask once by hand after it arrives before using it. We recommend washing it in a net. Please use a pressing cloth when ironing. *Please consider purchasing after reading the profile.