Size, size, size. Everything is designated by size.

This all seems perfectly logical until you find that 1/2-inch pipe is, like, nearly 7/8-inches in diameter!

So here, for your convenience, we shall dispel the size mysteries.  Please browse the subsequent pages of this guide for the unraveling of the size mystery.  Though we have a lot of good information here, we will be constantly updating the articles to bring you the latest of our discoveries on sizing.