1" C-to-C has an overall width of 1 1/2"
3" C-to-C has an overall width of 4 1/2"
4" C-to-C has an overall width of 5 1/4"
6" C-to-C has an overall width of 7 1/4"
8" C-to-C has an overall width of 9 1/4"
10" C-to-C has an overall width of 11 1/4"
12" C-to-C has an overall width of 13 1/4"
*All have projection of 1 3/4"
hardware includes screws