Here's a template of a Christmas Card I made last year, hope it might be useful to someone.
The size is 8.27 x 8.27, which means you can print it on a standard A4 sheet of card, edge to edge. Trim the excess with a rotary trimmer or craft knife. Return to printer to print second page, using your own printer's guidelines.
Papers - Christmouse kit by Donna Thomas
Bottletops - Retro Christmas SBM
Blessings - FS xx