How do I know that my frame or sunglasses fits me well?

Just follow these three simple steps.

 Frame Width- should accommodate no more than a finger's space between the frame's arm and your temple.

Arm Length-should ends just behind the ear, with arms only touching against the face in front of the ear.

Bridge Width-should feel comfortable if tight it will keep the frames to high if loose will allow the frames to slip too low.

Step 1: Check the frame width- It should only just extend past your cheekbones. If you can fit more than one finger between the arm of the frame and your temple, the frame is too wide. On the other hand, if the arm touches your temple, the frame is too narrow.

Step 2: Check the arm length-It should extend straight back to your ears and only touch the side of your head just in front of your ears. The arms must also not curve too early; if they do, this will push the glasses down on your nose.

Step 3: Check the bridge width-It should fit comfortably, neither too tight nor too loose. A too-tight bridge will be uncomfortable and compromise on your vision correction by keeping the glasses too high on the face. A too-loose bridge will allow the glasses to fall down on your nose, requiring constant readjustment