Some #10 cans hold almost 13 cups and some can hold as few as 9 cups. Here is a thread on the size and capacity of a #10 can:

http://www.onlineconversion.com/forum/forum_1045294157.htm

According to the following website, #10 cans are 6 & 3/16ths inches across by 7" tall.

http://www.ochef.com/1032.htm