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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; follow this link to read more about progressive lenses.
Reading Your Frame Size
Most name brand eyeglass/sunglass frames have some size information printed on the inside of the frame, although the lettering can be worn away with use. To find all the lettering, you must look on the inside of both temples, and on the inside of the bridge. If the numbering has worn off use the below size chart to take the measurements ( in millimeters ) yourself. All four sizes ( eye, bridge, temple, vertical ) are color coded to make the size chart easier to read.

Frame Size

Find Your Current Frame Size
Frame SizeIf you already own a eyeglass or sunglass frame, look on the inside of each temple to find the size of the frame...look at the image to the right. The Eye Size is always first then there a dash or a square the bridge size some space then the temple size. The vertical size is rarely on the frame.

Note: if the size is not on the temple look under the bridge.

Sunglass Size vs Eyeglass Size
In most cases a person's eyeglass frame is smaller than their sunglass frame, however if the styles of the frame are similar then the size might be similar. If the sunglass frame is a wrapped frame ( has a curve to it ) then usually the frame will fit a more wide-range of people.

Best Way to Find What Frame Size I Need
In most cases, if you're looking to purchase an eyeglass frame you should use the size from a previous eyeglass frame you've owned. If you're looking to purchare a sunglass frame then you should use the size from a previous sunglass frame you've owned.

The best thing to do is go to a local store try-on some frames until you either find a frame you like then come back to our website to purchase that frame. If you find a frame you like make sure you look on the inside of the temple to find the model number and the size since frames do come in multiple sizes.

Total Width of a Frame
To know truly how big the frame is, meaning how will it look on your face you must determine the total frame width. The total frame width includes the endpieces, and the endpieces are never measured and specified. The endpiece refers to the width of the frame from the edge of the lens out to the edge of the frame where the temples are connected to the frame front. In most cases an endpiece is 2-6 mm for a total of 4-12mm for both.

Frame Size

Measure Yourelf to Determine Your Frame Size
Frame Size Below are instructions on how to determine the best frame size for your face.
  • Looking into your mirror, hold a ruler so it is lined up with your temple. (See illustration for proper positioning)
  • You can put a pen or pencil in each ear to help position each ear.
  • Measure in inches the distance between your left and right temples.
  • Use the chart below to convert your measurement to a frame size.
  • You must only order a frame in which its size is within +/- 3 of your size.
To convert your measurement from inches to millimeters (mm) please multiply by 25.4...1 inch = 25.4mm.

To convert your measurement from centimeters (cm) to millimeters (mm) please multiply by 10...1cm = 10mm.

Already Have the Total Width
If you have the total width of the frame the best thing to do is subtract 6mm ( total average for both endpiece ). Find a frame that you like, take the eye size multiply by 2 then add the bridge size and that's the total width. If the total of the frame is plus or minus 2 of your total, then the frame might be a good size for you.

SimplyEyeglasses.com can help your search for eyeglasses, sunglasses, prescription eyeglasses, or prescription sunglasses, our representatives can assist you so contact us or call us at 866-665-6393.
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