Description

Adult small  22.4 x 13 cm (8.8 x 5.1 in)
Adult large  24 x 15.5 cm (9.4 x 6.1 in)

If you’re looking to find your Adult size, use a flexible tape measure or string to measure the distance from the bridge of your nose to just under your chin. If this is closer to 5 inches, you’re an Adult Small. If it’s 6 and above, you’re an Adult Large.