Here is a link to a chart of pipe shapes. After you click the link, click the shape you want to know about, and it will tell you about it. http://www.pipedia.org/wiki/Pipe_Shapes
Thanks Uber, I was thinking if starting a thread about this very subject. I can tell some apart bu can't tell what all of them are. I have a hard time discerning an apple from an egg from a billiard.
bullets wrote: "Can someone explain the difference between a billiard and a dublin? I legitimatrly can't tell."
I believe the bowl on the Dublin is canted slightly forward and has a bell-type shape, where the billiard bowl is perpendicular to the stem (assuming it's a straight stem) and has more of a uniformly cylindrical shape.