We used 12x12 scrapbook paper from one of those big paper pad packs.
I trimmed down each piece to 5"x7" on my paper cutter,
so I got three cards out of every sheet.
(If you don't have a big paper cutter at home is there one nearby
at school or a church you could borrow?)
We saved our scraps to re-use as embellishment on the cards
and to make paper chains and christmas collages!