watercolor bulk birthday cards assortment – 48pc bulk happy birthday card with envelopes box set – assorted blank birthday cards for women, men, and kids in a boxed card pack sweetzer & orange luxury card stock: beautiful notecards need beautiful stationery. our 5.75” x 4.25” cards are printed on 300gsm cardstock. they’re glossy on the outside, matte white and non-bleed inside. you can write on them with any pen! the set also comes with 120gsm mint colored envelopes, and everything is packaged into a lovely matching mint box.