When you visit an optician, the prescription you obtain covers all the details a
dispensing optician will require in producing the lenses for your sunglasses.
But both the style and size of the frame is your own personal choice
If you already wear spectacles or sunglasses, then you may be able to find the dimensions of the
frame printed / embossed on them. This would normally be on the inside of one of
the arms but could also be on the bridge or even nosepiece. If they are present,
you will recognise them as 3 distinct sets of numbers: the first represents the
longest dimension of the lens, the second is the distance between
the lenses, and the third is the side length of the
arm from the temple to the tip.
If these numbers aren't present, then don't be concerned - on some they are very
difficult find or they may have worn off. You can always use a ruler to measure
yourself by refering to the illustrations below.
What if you don't have my size?
Don't worry... The frame dimensions given are in millimetre, so there will be a
fair degree of flexibility involved. For example, a side length plus or minus a
few millimetres when compared to a pair you already wear will more often than not
be just as comfortable. Nose pieces can also be adjusted in many frames to take
up slight differences in bridge sizes. If you are not sure, then please contact
us for advice - we are here to help!.
Box Lens Width
This is more commonly referred to as the width of the lens. It is a measure taken
horizontally at the widest point across the lens..
More often than not, the width of the lens is longer than the height of the lens.
Distance Between the Lenses
More commonly referred to as the bridge measurement, it is more accurately a direct
measurement of the shortest distance from one lens to the other.
Side Length
The side length measurement measures from the hinge of the frames all the way to
the tip of the arm. If there is a bend in the arm, as shown in the illustration,
this measurement also includes the bend in the measurement.