Cat with Giant Cupcake Birthday Card Text Inside: Make a big wish! Illustration by Lizzy Rockwell * Please note: Genius Babies would be happy to include your personal gift card message to accompany your gift. Cards are 5” x 7” Comes with its own unique envelope Printed with soy based inks eeBoo now offers beautiful, artistic birthday greeting cards for children! They also include very unique decorative card envelopes to capture the birthday boy or girls delight! Birthday cards are a generous 5" x 7" in size.