Two cards in a single download!
Designed as 3 1/2" x 4 7/8" (8.9cm x 12.4cm) cards to fit in a standard A1 envelope, the designs are scalable for other sizes (please note that highly-detailed designs may prove difficult if scaled too small).
They look great on white card-stock with a colored inserts, dual-color paper, or colored construction paper. The designs are also provided in files separate from the card boundaries in case you'd like to laser-cut or print them in some other context.