Type 4 Oil breather pipe size

Anyone know this please. The hose from the breather box to the air filter box.

Thought id asked this before but cant find it (must of dreamed it!)

 

http://www.ratwell.com/technical/VacuumHosesCarb.html

 

yep 12 or 14 - helpful - not. Anyway was going to pick up on the way home but im already there. ta

 

Heater hose will go floppy and fall off. Just saying...