You wouldn't buy the wrong sized shoes, would you? No. So, Sightline categorizes our progressive power readers into three sizes: Narrow, Medium and Wide.
XL reading glasses in our wide category are designed to comfortably fit folks with larger sized heads. Proper fit allows you to wear our progressive power reading glasses all day long in comfort and style.
Not sure what size glasses you might wear- after all you probably did not grow up wearing glasses, so you may not know about frame fit. See why size matters.