S size
This version is perfect for narrow reading glasses with a circumference of
up to 100 mm (3,94″)
and length
up to 130 mm (5,12″)
M size
The medium option is designed to fit most popular prescription glasses with metal or narrow plastic frames whose circumference does
not exceed 125 mm (4,92″)
and length
up to 138 mm (5,43″)
L size
The most spacious option, accommodating larger prescription glasses and some sunglasses with a circumference of
up to 145 mm (5,71″)
and length
up to 149 mm. (5,87″)
