Went out and measured the cables around the garage - Wow - They are all different - Mountain bike 6mm, Old campy 5mm, Swollen PVC Fuji 5.5 to 6mm, Walmart cable 6mm... Duh... The link below gives some pretty good measurements but I think its the cables that are out of line...
http://www.framebuilding.com/Braze%20ons.htm
Of course if the brake cable housing is on the side with the swollen foot it will have to be larger...