>>957831I've got an old Charatan with a bowl diameter of 0.854" (21.7mm) and 1.82" (46mm) deep.
With all but the most aromatic tobacco that needs the absolute most space and no packing at all, it's too much pipe for me. I'll end up dizzy from the nicotine before I finish a bowl in it.
Pic related is the Charatan on the left next to a more average-sized pipe for comparison.