All classic pulls, thin pulls, and cup pulls 3" C/C.
All standard knobs are 29 mm in diameter.
All circle inset knobs are 1-3/8" in diameter.
Basic bar pulls are 3" C/C but are also available in 96mm C/C, 128mm C/C, and 160mm C/C variants. If you are interested in one of these different sizes of pull, please let us know after checking out with your selection of hardware.