As eyeglasses frames are functioning as pieces of aesthetic ornament, we need to spend time choosing appropriate eyeglasses frames. The two major factors which need to be considered are face shape and facial coloring.
Virtually no two face shapes are exactly the same. We have some basic principles to follow to choose eyeglasses frames for our face shapes. Normally we will try and buy eyeglasses frames which complement with the face shapes, and which should be proportionate to the face size. For example, we suggest rectangular eyeglasses frames for people with round faces, and vice versa. For oval facial shapes, wearers can have less restrictions in choosing eyeglasses frames.
Another factor is the skin color, and colors of eyes and hair. Basically people look the best in their own color base. So the best choice of colors of eyeglasses frames is to match it with the colors of skin, eyes and hair.
After all, above analysis is for general purpose. The final choice of eyeglasses frames are all based on the personal likings and favorites. As long as the wearers of eyeglasses frames feel the best, they are just most suitable ones.