Thanks for the answers!
I understand that landing distance changes all the time as another poster has mentioned, but I was looking at a general number.
Our company and proberly most companies use Autobrake 2 for most landings, but lets say you was going to an airport with 2000M runway, if you had a general ball park figure you would say "ok that's a bit short lets go Autobrake 3" for example then check the landing distance table.
My company doesn't define what a short runway is. A TRE told me 2300M he would consider a short runway.