---
title: "How to correctly measure a lock cylinder | Guide"
url: https://suskoenig.de/en/guide/schliesszylinder-richtig-ausmessen
description: "The correct cylinder length is crucial for security and function. Here's how to measure correctly."
lang: en
---

# How to correctly measure a lock cylinder

The correct cylinder length is crucial for security and function. Here's how to measure correctly.

18 April 2026 · 3 min read time

## How to measure your lock cylinder correctly

## Measured from the faceplate screw

The length of a profile cylinder is always given from the centre of the faceplate screw outward and inward, for example 30/35 mm. Note both measurements separately, as cylinders are often asymmetric.

## Don't let it protrude

A cylinder that protrudes more than about three millimetres on the outside can be broken off more easily. It must also not be too short, otherwise the door won't close properly.

## If in doubt, bring it with you

The easiest way is to bring the removed cylinder to our shop in Elmshorn. We determine the correct length and advise you on the right security fitting.

## Related articles from our guide

- Lost your car key: What to do now Key gone? Here's how to proceed, what documents you need, and when a spare key is possible without the original key.: https://suskoenig.de/en/guide/autoschluessel-verloren-was-tun
- Why a spare key is almost always worth it A spare key costs significantly less than a total loss. We explain when you should act.: https://suskoenig.de/en/guide/zweitschluessel-warum-sinnvoll
- Engraving: materials, ideas and what's possible From name plates to dog tags: an overview of typical engravings and the right materials.: https://suskoenig.de/en/guide/gravur-ideen-und-materialien

## Send us your vehicle data, we check feasibility

Make, model, year and a photo of the registration document are enough. You will get an honest assessment before you come to us in Elmshorn.

Send vehicle data now: https://suskoenig.de/en/car-keys/request

Directions to the shop: https://www.google.com/maps/dir/?api=1&destination=Hans-B%C3%B6ckler-Stra%C3%9Fe%201%2C%2025337%20Elmshorn

## How to find us

Hans-Böckler-Straße 1, 25337 Elmshorn

Get directions: https://www.google.com/maps/dir/?api=1&destination=Hans-B%C3%B6ckler-Stra%C3%9Fe%201%2C%2025337%20Elmshorn

Call: +4941217021533
WhatsApp: https://wa.me/4917672871842?text=Hello%2C%20I%20have%20a%20question%20about%20my%20key%3A
Route: https://www.google.com/maps/dir/?api=1&destination=Hans-B%C3%B6ckler-Stra%C3%9Fe%201%2C%2025337%20Elmshorn
Car keyrequest: https://suskoenig.de/en/car-keys/request

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