Are you trying to make a fashion statement with your glasses, or do you want people to barely notice them?
Thick frames are bold and unmissable. People with strong facial features like prominent noses or chins should think about trying thick frames, which will help de-emphasize those features. Thick frames usually come in dark colors, but as they’ve grown in popularity other options have joined the mix—clear thick frames are a cool and trendy look.
Thin frames blend into your face. They emphasize your eyes and other facial features. If you want people to notice your face, not your frames—or if you don’t want to draw attention to your glasses—go for thin frames.
The width of your frames is like the width of your shoes—this isn’t a fashion choice, it’s a matter of getting the correct fit. A couple of frame width fit rules to keep in mind:
1) There should be a gap between the arm of the glasses and your temple, but it should be a very small gap.
2) When you smile, the glasses should continue to rest on your nose, not get jostled by your cheeks.
Don’t worry too much about the width of the frame’s arms. These are nearly always designed to be in proportion with the thickness of the frame overall. Thick arms usually go along with thick frames, and provide balance. They are most common on sunglasses. Most frames for regular glasses have thin arms.
Frame length, however, is another matter. Most adult women want a frame arm between about 135-140, whereas most adult men should look for frame arms from 140-145. These figures vary depending on face shape and size.