I’ve redesigned the cards to Bridge Size (2.25×3.5 inches (56×87 mm)) and I have ordered 200 blank Bridge cards to use in my printer.  I’ve asked the GURPS community on Google+ to make any suggestions and to add any Maneuvers not covered in the current GURPS Combat Cards.  I’m still working on the Monster cards and I’m unsure if to actually use them or stick with 4×6 note cards.