I've had 2 ABS avocet locks on order for the last week and still no sign due to the backlog
Picked up some Astral S ones instead yesterday so will see how i get on with those
Measuring is relatively simple, remove the cylinder and measure the total length then the length from each end of the cylinder to the centre fixing hole, the internal measurement (portion of the lock inside the house) is always quoted first, then the external one,
This is usually only applicable to the higher end locks such as the ABS/MTL as its important the external side is correctly positioned to provide full protection
e.g my locks are 80mm total length made up of 45mm internal and 35mm external, so if looking at an advert when purchasing they would be known as 45/35