3dRose Red Hat Birthday - Greeting Cards, 6 x 6 inches, set of 12 (gc_13435_2) Dimensions (in inches): Card 5.5 H x 5.5 W, envelope 6 H x 6 W Heavy duty card stock with black interior Additional postage may be required Cards are creased for easy folding Set of 12 greeting cards; 12 white envelopes included.