Width points. The ideal width is the distance between the points your temples. Of course, you can purchase a frame smaller or larger sizes, but only if you feel comfortable in these glasses.
The height of points. The height of points-is also quite important aspect and, in most cases, it depends on your preferences. So, if you suffer from myopia, doctors recommend to order a higher rim to survey was more extensive. On the other hand, people who are looking for glasses for reading, can choose a narrow frame, which can be offset on the tip of his nose and look into the distance over the points. So it all depends on the desired review.
Form points. Appropriate form eyeglasses should not repeat the oval of the face, but rather to contrast.