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View our help section under PD/Pupillary Distance to find out more information to measure your PD accurately
Available Colours
Optical accessories Accessories, 1x PD/Pupillary Distance Rule.
Product SKU: ss123.39
*Delivery times may vary based on the country of residence of the customer. See Production and Delivery Timescales for further information.
Not satisfied with your ordered items?
We're so confident in the quality of our products we offer fuss free returns. We hope you don't need to return anything to us, but if you do then these guidelines will help you.
Our Return and Refund policy
We promise to refund or exchange any items that you are not completely happy with when you return the item to us in re-sellable condition within 7 days of receipt.
Please note that we can only refund the price of frame. This excludes any delivery charge and any additional costs on lenses originally purchased. Items supplied with SelectSpecs.com free lenses will incur a £5.00 charge on return for refund.
A refund for frames, lenses and original postage costs will only be applicable if the error was made by SelectSpecs.com. Kindly note we are not able to refund any returned postage costs in addition to a full refund however a credit will be held in your account which you can use towards a new order.
SelectSpecs.com - Guide to Frame Sizes
What do the Numbers Mean?
All measurements are taken in mm with the arm length rounded to the nearest 5mm.
The Arm Length
This number represents the arm length of the glasses or sunglasses. The arm length is measured from the dowel point (the hinge area) to the extreme end of the side, this is made up of the length to the bend and the length of the drop to give the overall length of side.
The Bridge Width
This number represents the bridge width of the glasses or sunglasses. The bridge width is the minimum horizontal distance between the nasal surfaces of the rims on a plastic or metal frame, or the minimum horizontal distance between the nasal surfaces of the lenses in rimless frames.
The Lens Width
This number represents the lens width of the glasses or sunglasses. The lens width is the distance between the vertical sides of a rectangle containing the lens shape. On some occasions for Sunglasses with a single 'sheild/visor' style lens, we will enter the width as 0 or 99.
The Frame Height
This number represents the Frame height of the glasses or sunglasses. The Frame height is the distance between the top and bottom sides of a rectangle containing the lens shape. If we do not have this measurement stored then this measurement will not be displayed
How do I Know What Size Is Best?
If you are not sure what measurement is best for you, take a look at your current pair of glasses or sunglasses, these will have a measurement on the arm or on the bridge in a format like 135 - 15 - 48 although this can vary from manufacturer to manufacturer. The below image is a good example of how frame dimensions are clearly identified.
I Want a Size That's Not Listed
We do our best to ensure we stock all available items from all our supplied brands so if an item is not listed it may be out of stock or discontinued. If you do not see the frame size you require please contact us through our Customer Services system where we will try to assist you.