"X" is for Xerophyte to my illustrated alphabet created in pen and ink. Xerophytes are plants that require little water. The saguaro cactus is a xerophyte. The alphabet images are whimsical and not traditional such as "A is for apple". Perfect for children and adults. The blank cards come 10 to the package with envelopes. Each cream colored card is 4" x 5 1/2."