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15% OFF Frames $59+   Code: AUGUST15


15% OFF frames & sunglasses over $59

Use code 'AUGUST15' at basket.


TERMS: 15% OFF Frames over $59

1). Valid on frames & sunglasses over $59 only.

2). Does not include lenses.

3). Not valid on 2 for 1 collection.

4). Expires 31st August 2022 23:59GMT.

Optical accessories DesGlasses & Sunglasses

Optical accessories 1x PD/Pupillary Distance Rule

4.5 / 5 (125)  |   100% of customers recommend this product

White Rule 1x PD/Pupillary Distance Rule Accessories, Optical accessories

Choose Option:

  • Available to Order   More Details
  • Free Delivery available for orders over $61.74
  • Dispatched from Westgate on Sea, UK

Product Description

FREE Delivery on this item

Actual PD Rule received may differ slightly from that shown in the image above.

Video Guide - How to Measure Your PD (Pupillary Distance)

View our help section under PD/Pupillary Distance to find out more information to measure your PD accurately.

Product Overview


Optical accessories 1x PD/Pupillary Distance Rule

Product SKU


Order by phone

Call us on 0330 165 6900
Mon. to Fri. 9am - 5pm GMT

Secure Payments

All major payment cards & methods accepted.

100% Satisfaction.

Not happy with your new glasses? We'll give you your money back! Full T&Cs.

Customer Photo's & Reviews

4.5 / 5 - 125 Review(s) - Add your review

 100% of customers recommend this product (76 of 76)

Customer Photo's

  Postage for a supposedly free delivery item.

29th July 2022

My only grouse is that for a supposedly free delivery item ( a pd measuring rule), I was charged £1 - 25 for delivery.
It's not the end of the world I know, but annoying when the item only cost £1 - 00 !
The selectspecs ad still says that it is a free delivery item.

Fit - True to Size I'd recommend this product

  Does the job

3rd May 2022

Very cheap to work out your pd pupil distance

Fit - True to Size I'd recommend this product

  May what I needed

7th April 2022

Excellent for easily measuring PD. Thank you selectspecs

Fit - True to Size I'd recommend this product

  Economical and effective

1st March 2022

Comfortable to hold and use. Also can double as a pocket size ruler. Very functional product at a very reasonable price.

Fit - True to Size I'd recommend this product

  Good for the money

2nd December 2021

Surprisingly good for only £6.

Fit - True to Size I'd recommend this product

+ Show 5 more

Product Help

Help with frame sizes

Finding the correct frame size to suit you requires you to know a little about the different measurements that are used.  Size information is normally broken down in to arm / temple length (ranges between 120 - 150mm), bridge width (ranges between 14 - 24mm, and lens width (ranges between 40 - 62mm).  We also include a frame height measurement where possible, this can vary depending on frame style.

If you require further help, please do not hesitate to contact our customer service team on 0330 165 6900 (Mon - Fri, 9am - 5pm) for further assistance.

I already have glasses, how do I find out their size?

If you have a pair of glasses that are a perfect fit, you can usually find the frame size information on the frame - usually on the arm or the bridge.

Size Guide - Frame Dimensions

What to look for?

What to look for?
You will often find a variety of information on the frame, including model number, branding and frame sizing. The numbers you are looking for will be similar to this format 150 - 22 - 50 although this can vary from manufacturer to manufacturer.  These numbers provide the following information:-

150 - Arm / temple size (in mm), a 3 digit value normally ranging from 120 - 150.
22 - Bridge size (in mm), a 2 digit value normally ranging from 14 - 24.
50 - Lens width (in mm), a 2 digit value normally ranging from 40 - 62.

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.

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