There are a number of ways to determine your frame size for glasses or sunglasses. This guide will aid you pick the right frame size for you. 

Firstly, understanding the frame measurements will certainly narrow down the choice of frames.

If you already have a pair of spectacle that fits you perfectly, best bet would be to go with same/similar measurements.

 

Option 1 :  Look at the your current pair of glasses and use the dimensions  

The easiest way to select a suitable frame size is to take the dimensions from a comfortable pair of glasses that you already have. If you look at the inside of the arms on your current spectacles you will see writing displaying the frame model code, colour code and 3 measurements.

The 3 measurements are what should interest you. The first two measurements will usually be separated by a rectangle. Alternatively, you might find these measurements are on the inside of the bridge (especially on metal frames) or the inside of the right nose pad on plastics frames. The side length can sometimes be stamped on the inside of the plastic end tips.

Here is a sample photo of how that looks:  

 

 

 

The first measurement is the Eye Size, Lens width or Lens Diameter in millimetres and is measured across the lens from the bridge. In the photo this is 52mm.

The second measurement is the Bridge Width in millimetres, which is 17mm. This is the area which sits directly above your nose. Smaller measurements will suit narrower bridges whilst larger measurements will suit broader bridges. On most metal frames the bridge width is less important as it can be adjusted to suit nearly everyone. However, many plastic frames cannot be adjusted. In the photo this is 18mm which is standard for most adults.

  

The third measurement is the Arm Length or is sometimes referred to theside length or temple size in millimetres. Arm length is the overall length of the side measured from the centre of the dowel screw that secures the side to the front, to the end tip, with the drop end or hockey end straightened out. When measuring a frame side it is not necessary to straighten the side to obtain the correct measurement.

Simply place the ruler on top of the side and'walk' it around the outer radius of the bend to the tip. Side lengths as a rule tend to increase in 5mm increments. This is 146mm in the photo.

There are three arm lengths that can be regarded as standard for adults; 135mm, 140mm and 145mm. 

 

Do the maths..

(2x Lens Diameter ) + bridge width + 6mm = Frame Width/Frame Size. 

You can now work out the frame width or what we call frame size on our website. 

This can be calculated by taking the lens diameter x 2, add the bridge width and add on 5-6mm to cover the hinge extensions for both end pieces. 

 

Option 2 :  Measure yourself to determine your frame size 

 

When thinking about measuring a face for frames, you first need to consider the many parts that glasses have. Because of this, glasses don't just come in large or small sizes. Instead, the size depends on measurements such as frame width, bridge width, and arm length. 

To do this at home, you’ll need a mirror and a ruler. Find a ruler that measures in centimeters or millimeters, as glasses are always measured in millimeters.

Frame Width

 

Frame width is the most straightforward aspect and is determined by measuring the distance between your temples. To find your frame measurement, hold the ruler horizontally across your face and just below your eyes. You’ll then get your temple measurement by noting the distance between your left and right temples.

 

Bridge Width

 

Bridge width refers to the width of the space between the lenses, or where the glasses rest on your nose. Your bridge measurement is important, as it can be quite frustrating to have a pair of eyeglasses that slide down the bridge of your nose. 

 It is dependent on the size and position of the bridge of your nose. Use a mirror and ruler to measure your bridge width. Be sure to also note the shape and placement of your bridge when measuring, as it can help you find the right frames fit for your face.

 Remember that the bridge measurement may change depending on the frame material; thicker frames will have more space between lenses, so the bridge width will be greater.

 

Arm Length

 

Arm length ensures that your glasses will fit comfortably over your ears. If you have a longer temple, you'll want a longer arm length. Those with smaller temples will need a pair of eyeglasses with a shorter arm length.

 

Option 3 :  Measuring an existing pair of frames  

 

You could measure an existing frame if the sizes are not already printed. Please use this guide to determine the size.