Choosing your correct size frame

Most frames have a good degree of size flexibility.  The important sizing to check is the glasses frame width and the bridge.  A mistake many people make is choosing glasses far too small for the face.  An ill-fitting pair of glasses can displace the prescription’s optical centre which could affect vision and make the frames uncomfortable to wear and not visually attractive.  Ensure you are being fitted by a trained optical dispenser when choosing your frame.

Frame width is the front view horizontal measurement of the frame from one end to the other.  For best fit the frame width is measured from temple to temple just above your eyelids.  This measurement usually correlates (within a few mm) of the temple or arm of the glasses and is a good indicator of your frame size.  OR measure the frame width of a pair of glasses at home that you are happy with.

As there is quite a degree of flexibility in frames the measurement does not have to be 100% exact, however a well fitting pair of glasses will be more comfortable and visually enhance your features if the frame width is observed.  Check your frame width and PD when choosing your new Spex.

Sizing is displayed as (eg) 52 – 18 – 135 and can usually be found inside the arm of the frame.  We grade the frames into small, medium and large taking all factors including frame width and bridge into account.

  1. 1st number is the Lens Diameter in mm.  Measured horizontally at the lens midpoint.
  2. 2nd number is the Bridge Width.  If this is too narrow for you, the glasses may sit too far forward of the nose and alter the vision. It could also be uncomfortable.
  3. 3rd number is the Temple or Arm of the glasses which extends from the front of the frame to behind the ears.

Frame or lens depth will affect the type of lenses that can be fitted.  Single vision lenses can be fitted into all frames.  Lens depth less then 26mm will not be suitable for progressives or bifocals. This is displayed on our website.

Check the Frame or lens depth also when you are looking for a style to enhance your features.  For example, some face shapes do not suit round or very deep frames.

(See face shapes for more styling advice)