Xmas shutdown - We will close on 20th Dec at 4.45pm and re open on 2nd January at 8am, No orders will be despatched during this period. MERRY XMAS TO ALL.

Shop Now
Order Enquiries &
Customer Service
0113 2360800

How to measure a cylinder lock

There is a large range of sizes of cylinder locks in two main profiles: Euro and Oval. This guide will help you to identify and measure your cylinder lock to ensure you purchase the correct replacement.



See which lock type you have

Firstly, ascertain whether you have a Euro profile or Oval profile cylinder lock. The difference between the two is apparent when looking at the locks face-on.

On the left is an example of a Euro profile lock.  This profile is most likely to be found on UPVC doors.

On the right is an example of an Oval profile lock. The simpler form of this lock means that it is more often found on timber and aluminium doors.


Remove the lock from your door

Please see our separate sheet for step-by-step instructions - and note which of the layouts it matches.

Top: Double cylinder lock - Found on external doors requiring a key on both side

Centre: Half cylinder lock - Found on doors requiring a key on one side only (garage doors, gates etc)

Bottom: Thumb turn cylinder lock - Allow key-free easy exit - ideal for sheltered accommodation, store cupboards etc


Take some measurements

Lie the lock on a flat surface and take the following measurements:

  • A - Left end of cylinder to centre of the fixing hole
  • B - Centre of the fixing hole to the right end of the cylinder
  • C - Total overall length - check A +B is the same
Same Day Dispatch

Our generous stock inventory means that we can supply those much-needed spare parts on same day dispatch: enabling you to get on with the job as quickly as possible.

Send Us A Photo

From one-off purchases through to trade accounts we are here to help. If there is anything you are not sure of please contact us: if you're searching for a specific part, why not send us a photo – we can often help to identify the required part that way; giving you extra peace of mind.

Send Your Photo To
07734 955 325
or fill in the form:

* Required Fields

Latest From The Blog

  • The Ribbon is Cut & We’re Open for Business!

    The Ribbon is Cut & We’re Open for Business!

    After a positive first month of trading, UPVC Maintenance Supplies were honoured to be joined by Gateshead’s Deputy Mayor; who agreed to officially open our newest Branch.

    Read More
  • Tips and tricks to secure your home

    We’re almost two thirds of the way through National Home Security Month 2017 and as a hardware supplier we see handles and locks in all states. We’re more than familiar with the devastation old and badly maintained hardware can lead to, so here are some of our top tips:

    Read More
  • Get Ready Gateshead! UPVC Maintenance Supplies are coming…!

    Get Ready Gateshead! UPVC Maintenance Supplies are coming…!

    UPVC Maintenance Supplies are delighted to reveal that we’re on the home straight to opening our third trade counter, this time on Team Valley Trading Estate in Gateshead. The branch will open its doors for the first time on Wednesday 4th October, bringing 25 years of industry expertise to the window and door repair market of Gateshead and the surrounding area.

    Read More

Site Secureed By
Site Secureed By