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Eyewear Frame Guide


When selecting a frame, looks as well as fit are very important. The following information will help you choose an appropriate frame. Please contact us if you need any further assistance selecting a frame.
Determining frame size:

Previous glasses wearers can look at their old frames as a reference. On one of the temples (arms) of the frame, or on the bridge (nosepiece) there are usually a set of numbers (i.e. 48-16-140, see image below right). The first number is called the eyesize, and this represents the diameter of each side of the frame across its widest part, in millimeters (mm). This number usually ranges from 45 mm and higher. If you cannot locate this number, you can always measure the eyesize (see two images below). Using a centimeter ruler, measure one side of the frame straight across its widest area, from edge to edge.

If you are new to glasses, usually trying on different frames of different widths will help determine your ideal size. Most adults fall into three different widths: small (45-49 mm), medium (50-55 mm) and large (56 mm and up). Also, if you know your PD (pupillary distance) measurement, that will help determine your eyesize. PD's that range from 55-59 mm fall into the small-width category, 60-65 mm are medium-width, and 66 mm or more are larger-width. The larger the PD, the wider apart your eyes are, which requires a larger eyesize.

Frame Number Identifiers
Once you know your eyesize or frame-width, it's important to use that as a reference when looking for new glasses. You want to try to stay close to that number or the glasses may appear too wide/narrow, and your eyes will not center and see properly through the lenses. Also important to note is if you are nearsighted (myopic) and your prescription is high (i.e. - 6.00 or higher), a larger frame will emphasize the thickness of the lens edge.

The second number you need to know is the bridge size (the width of the frame that sits on the nose), which is the number found printed next to the eyesize on frames. Usually bridge sizes can range from 15-23 mm. For Asian people with less prominent bridges (especially women), a smaller bridge size is recommended (usually between 15-18 mm). When wearing a plastic frame without adjustable nosepads, bridge size determines how the frame will sit on the face. If the bridge is too wide, the frame will not rest on the nose and instead sit on the cheeks, thus sitting too low and not an ideal fit. A proper-fitting bridge on a plastic frame will sit snugly on the nose. Usually frames with smaller eyesizes will have a small bridge size, and vice versa. You will find most of our frames have bridge sizes ranging from 15-18 mm. If your prescription is high (greater than +3.00 or -6.00), it is recommended you select a frame with adjustable nosepads to reduce the chance of the lenses sitting too close to the eyes and hitting the eyelashes.

The third number found next to the bridge size is the temple length, which represents the length of the temples (arms) also in millimeters. Standard temple length ranges from 125-145 mm for the average adult, and is in proportion to the eyesize. This number is not as important, as the temples can be adjusted to fit snugly around the ears.



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