What size vacuum line do I need?

So kingcobb and I are switching out his(and possibly my own) vacuum lines and weren't 100% on the size. help?

Yeah I was thinking 4 mm for a bunch of the regular vacuum lines and 6 mm for the size of hose running from the turbo nipple to the wastegate, would those sizes be alright? For those hoses and others relatively the same size??

IIRC there are 3 different sizes that I came across.....one size for the inlet manifold vacuum lines, another size for the dump valve and the largest for the air con idle up valve. Cant remember what any of them were.....use a ruler and measure them to be certain