I have designed a series of 6 notecards which can be sold individually or as a box set. A box of 12 cards would include 2 of each design, but other combos are possible. With the notecards, one can fit 2 cards on an 8.5"x11" sheet. This image shows the front and the back of two cards arranged for printing. I can change the info shown for BICAS. I can also eliminate the reference to me and my URL if you object to its incluison.
Larger greeting cards are also a possibility, but they would be more costly to produce and sell.
This is the inside of the card done as a congratulations card for a new baby. The inside messages can be changed and inside and outside designs can be mixed and matched in various combinations if you wish.