Just trying to find out what everyone is using as a standard size brake line. I was at the store last night to pick up some and they have 1/4" and a smaller size. I held off to go check what is on the rear that I installed and it was smaller line the the original stock that came on my 52 Chevy. I am adding an under the floor booster/ Master setup and when I checked the extra one that I have I realized that they used the 1/4" on some lines and the smaller on the other. I think the other size is an 1/8" or they are 5/16" and 3/16" I cannot remember off the top of my head. Is there a one size for all or at least a guideline for what to use? Thanks