Clutch pipe size

I need to make up a new clutch pipe for my 110. I am going to use cunifer as that is what I used last time and it lasted about 10 years until the fire. I am trying to find what size pipe I need to get. I have some 7mm od (might be imperial equivalent) on the shelf which I am assuming is from when I did it last time as it is too large or brake lines.
mall of the threads I have found on this are arguing about the fitting thread sizes which I am not worried about as I have plenty of fittings to reuse from donor parts. Can someone confirm what size the pipe needs to be.

Reckon you need 1/4 inch, std brake pipe kunifer is 3/16 inch or 4.8mm, which may be to small for clutch as the fluid need to move back and forth faster.

lynall said:

Reckon you need 1/4 inch, std brake pipe kunifer is 3/16 inch or 4.8mm, which may be to small for clutch as the fluid need to move back and forth faster.

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I was just about to post. I have dug back through emails and have orders for 3/16 and 1/4 kunifer. So assume the 3/16 is for brakes and 1/4 is for clutch. Thank you for confirming. Means the larger pipe I have already is the correct stuff. Better to use what I have already than order more. Rebuilds are expensive!