Download Article

Download Article

Measuring a pair of glasses frames is relatively simple. If you already take a pair of glasses that fit you well, you may be able to salvage yourself some work and read the spectacles measurements right off of the frame. If not, yous tin can utilise a ruler to calculate the necessary measurements on a pair of glasses past measuring the dimensions of the frames and of the lenses themselves.

  1. one

    Read the three numbers on the inside of an arm to find the measurements. There should be three numbers printed on the within of either the left or right temple arm (the long, curved parts that tucks behind your ears). Information technology'll look something like this: "55-55-145." These numbers are the glasses' measurements in millimeters.[1]

    • The first number is the glasses' lens width, the 2d is the glasses' bridge width, and the third is the glasses' temple-arm length.
    • If your glasses don't have this information printed, you'll need to find those measurements with a ruler.

    Tip: In general, all measurements associated with eyeglasses and frames are given in millimeters.

  2. 2

    Measure the glasses lenses from side to side to find the lens width. The lenses are the slightly convex pieces of drinking glass, so when you're measuring lens width, practise not measure the metal or plastic surrounding the lens. Simply position your ruler with the "0" resting against ane edge of the glass and measure horizontally beyond to the finish of the drinking glass lens on the other side.[two]

    • In most pairs of glasses, the lens width can vary between 35–60 millimetres (1.four–2.4 in).
    • Although the lenses themselves are convex, yous do non need to add together whatever extra length to the lens measurements to compensate for the curved lens.

    Ad

  3. 3

    Calculate the vertical lens height by measuring from top to bottom. One time you've measured the lens width, rotate your ruler 90° to find the lens acme. Align 1 cease of your ruler with the lowest part of the lens and mensurate to the highest part. If y'all're measuring round lenses, exist certain to measure from the very bottom to the very top of the curve.[three]

    • More often than not speaking, the lens acme measurements range from 21–45 millimetres (0.83–1.77 in).
    • If yous're hoping to get bifocals or progressive lenses, you'll need to have a lens pinnacle of at to the lowest degree 30 millimetres (one.2 in).

    Advertisement

  1. 1

    Measure out the width of the frame from top right to superlative left. Concord your ruler in forepart of the glasses' frames and mensurate the horizontal distance between the uttermost-apart points of the glasses. In nearly all cases, this volition be the distance betwixt the outside corners of the ii hinges on the peak right and left corners of the frames.[4]

    • Measuring the glasses in this way will give you the frame width. Frame width measurements can vary between 110–150 millimetres (four.iii–5.ix in).

  2. 2

    Have the measurement of the small bar that goes to a higher place your nose. This part of the frames is known every bit the "bridge." It covers the bridge of your olfactory organ and connects the 2 lenses together. Calculate the span altitude by measuring on summit of the bridge of the glasses from where it intersects with the outside edge of 1 of the lens frames to where it intersects with the other lens frame.[five]

    • When purchasing new glasses, it's important that you measure the span width equally accurately as possible. Endeavour to be accurate to within 2 millimetres (0.079 in). This is important since the spectacles won't fit on your face if the bridge measurement is off.
    • Span measurements typically but vary between 5–25 millimetres (0.20–0.98 in).

  3. iii

    Calculate the length of the temple arms past measuring from terminate to tip. The arms are a picayune catchy to measure, since each temple arm bends at virtually l° every bit it curves behind your ear. Place your ruler and so the "0" aligns with 1 of the hinges. Measure down the length of the temple arm, and tilt the ruler when you lot come up to the bend in the arm. Continue measuring until you reach the tip of the arm.[6]

    • Depending on the size of your glasses, the temple arm measurement tin vary from 118–150 millimetres (4.six–5.9 in).
    • If yous find that it's too challenging to measure around the bend in the arms, try measuring the arm in 2 different measurements. Measure from the hinge to the center of the curve and and then measure from the end of the arm to the center of the curve. Add the ii numbers together to get the full arm length.

    Advertising

Enquire a Question

200 characters left

Include your email address to get a bulletin when this question is answered.

Submit

Advertisement

Things You'll Need

  • ane pair of spectacles
  • Ruler

  • Information technology's helpful to know the size of the spectacles you'd similar to purchase if yous're shopping for new glasses in a brick and mortar store or through an online vendor.

  • The frame width is generally considered the virtually important measurement on a pair of glasses. Information technology'south never printed on the inside arm.

  • Measurements other than the bridge measurement are a little more forgiving. Your measurement tin can be off by 3 millimetres (0.12 in), and the glasses will even so fit your face fine.[vii]

Thanks for submitting a tip for review!

Advertizing

References

About This Article

Thanks to all authors for creating a page that has been read 16,761 times.

Did this article help you?