Chicago is correct
Polywad has 2" in 6s and 7 1/2s
http://www.polywad-shotgun-shells.com/12ga2vin6/
RST has 6s, 7 1/2s, 8s, and 9s
http://www.rstshells.com/Shells-best.htm
RST will mix shot size in a case.