What size hose should I use for my clutch lines?

Is -3 big enough or should I use -4? If -4 is the right stuff where can I get the ends for it? Rally des only sell -3 ends by the looks of it.

Cheers,
David

I'm using -3 with no problems

Really dosen't matter --- we used to plumb the clutch line front to rear on Imps and Davrians with normal 1/8" Kunifer pipe --- no problems.

I have this on my land rover; it is larger than brake hose, sorry, but don't know exact size - think it is 1/4 inch pipe wise.

Thanks very much