Mortice door latches and locks come in different sizes and working out the right one for your door can be tricky. The most common sizes in the UK for internal doors is 63mm and 76mm. This is the overall measurement of the latch length, often referred to as the case. Read more
Here is a simple guide to help measure for a door latch.
How to measure your cylinder lock - Lock And Key Blog
Measurements for New Door Hardware - Period Homes
How to fit a door handle for external doors
Versa Euro Cylinder, Same Day Dispatch
Commercial Door Lock Guide
How To Measure A Tubular Latch
How to Buy Door Knobs: 13 Steps (with Pictures) - wikiHow
How to Measure a Door Latch – Emerald Doors
What Size Locks and Latches Do I Need?
Measure a door handle
How to measure a door latch