Frame Width
A frame that is too narrow will make your face look wider, while a frame that is too wide will make your face look narrower. Typically, this is the most important factor in finding a pair of glasses that fits well.
Temple Length
Temple length is the measurement in millimeters of the ‘arms' of the frame. This measurement does not vary as much as the others, with 135mm, 140mm, 145mm, and 150mm being the most common options.
Lens Height and Width
Lens height is the distance from the top of a lens to the bottom. Lens Width is the distance from the left side of a lens to the right side.
Bridge Width
The distance between two lenses equals a frame's bridge width. If you have close-set eyes or want a narrow bridge, this number should be lower. If you have wide-set eyes or want a wide bridge, this number should be higher.
