I found out in a thread about Randy Wiley pipes, that when we all discuss the sizes of pipes that we all have different versions of what "big" is, probably due to how we relate to our pipes. I could say that I've never seen a small Randy Wiley Pipe and half a dozen guys would say that there are a lot of pipes larger than his. A lot of guys would agree with me. And, some would say that Randy Wiley pipes are the smallest in their collections ...the theory of relativity.
Also, looking at the numbers doesn't help. I have a 6" long 2.5" tall long and lanky Hilson dublin that is one of the smallest pipes I own. I also have an Ardor bent bulldog that is 6" long and 2.5" tall, but hangs below my chin and is the absolute largest pipe I own.
Pictures don't help me much, unless there is something to compare it to in the picture as well. Or a grid, like CupoJoes uses. This is why IO posted that picture in the first comment. The blog had said that the pipe was a Peterson XL. Comparatively, it is about the largest Pete I've seen.