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How to Determine Sizing & Pupil Distance

SizeEye SizeBridge SizeTemple Size
Petite Female 46-48      16-18     130-135
Average Female/Small Male 48-50      17-20     135-140
Average Male/Large Female 50-52      17-20     135-145
Large Male 52-58      18-22     140-150


Frame Size

Standard Frame Size Coding

The sizes you can see with each of the frames on this website are of the same format. They are all given in millimeters, and the numbers are separated by a /. For example 46/20/135.

  • The first number is the lens diameter.

  • The second is the bridge width.

  • The third will be the arm length.


Frame dimension details.
Measurements For a Frame
A frame has 4 basic frame sizes ( eye, bridge, temple, vertical ):
  • Eye Size - refers to the horizontal width in millimeters of one of the frame's lenses.
  • Bridge Size - measurement is the distance in millimeters between the two lenses. It is measured between the two closest points of the two lenses.
  • Temple Size - is measured along the length of the temple, from one end to the other, including the bend.
  • Vertical Size (B) - refers to the vertical height of an eyeglasses lens, and is measured from the tip to the bottom of the lens aperture of the frame. The measurements are taken from a horizontal line intersecting with the top of the lens, to the horizontal line intersecting with the bottom edge of the lens. The B measurement is only important when ordering multifocal lenses



What is Pupil Distance (or PD for Short)?

It is the distance in millimeters from the center of the pupil of the right eye to the center of the pupil of the left eye. To give you optimum vision, this measurement must be accurate so that the center of the lens is in line with the center of your eye.

To get your pupil distance, you need to ask your optician for this measurement at the time of your eye test, measure it yourself with a mirror, or ask a friend to help you. If your optician measures your PD, make sure it is marked on your prescription.

You can measure your own PD using a mirror and a millimeter ruler

  1. Place the ruler flat against your forehead and with your right eye closed, line up the zero on the ruler with the center of your left pupil.  

  2. With your left eye closed, take a reading of the ruler at the center of your right pupil.

If you have difficulty seeing what you are doing, then use a magnifying mirror. If it is easier, line up the outside of the iris of one eye with the inside of the iris of the other eye and use that 

We need your distance PD on the order form if you are ordering distance or bifocal glasses, and your near PD on the order form if you are ordering reading glasses

Your near PD is 3mm less than your distance PD, as your eyes move closer together when you read. For adults, the typical PD measurement is from 54 to 66. If you do not supply your PD measurement, we will set distance optical center at 65mm for men and 63mm for women.

Only one measurement is necessary. Any adjustments needed for reading or bifocal glasses will be made by us.

If you enter incorrect prescription information such as an inaccurate papillary distance measurement, you may not be able to see well with your new glasses. We cannot be responsible for mistakes in prescription information provided by you or your optometrist or ophthalmologist. We guarantee that your prescription safety glasses will be made exactly to the specifications that you provide.


To ensure your frames fit perfectly, you first have to determine which size frames are best for you. The best place to start is with the measurements on a pair you already own. You know those little numbers on the inside of its temple? That's what you're looking for. The frame measurements appear in the following order: lens width, bridge width, and temple length.

Measure PD your self

Lens WidthLens Width

This is the horizontal width (in millimeters) of each lens.

Lens Width

Bridge WidthBridge Width

This is the distance (in millimeters) between your two lenses.

Bridge Width

Temple LengthTemple Length

This is the length (in millimeters) from each screw to its temple tip.

Temple Length


Measure PD your self

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.

 To find frame width, measure the front of the frame from screw to screw.

Lens Width

Temple Length

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.

 To find temple length, measure one from screw to tip.

Lens Width

Lens Height and Width

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.

 To find lens height and width, measure the widest or longest parts of the lens.

Lens Width

Bridge Width

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.

 To find bridge width, measure the distance between the inner edges of each lens.

Lens Width

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