3dRose Mermaid swims with a dolphin underwater - Greeting Cards, 6 x 6 inches, set of 6 (gc_172228_1) 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 6 greeting cards; 6 white envelopes included.