3dRose Greeting Cards, 6 x 6 Inches, Pack of 12, Congratulations or Happy Birthday (gc_202090_2) Dimensions (in inches): Card 5.5 H x 5.5 W, envelope 6 H x 6 W Heavy duty card stock with blank interior Additional postage may be required Cards are creased for easy folding Set of 12 greeting cards; 12 white envelopes included.