Donut Classroom Classroom Valentine Exchange CardsMake your child's Valentine's Day extra special this year! These Donut Valentine Exchange Cards feature a silly pun and fun and colorful donuts. Some features of our Classroom Valentine Cards: Professionally printed on 80# cardstock No envelopes needed! All you have to do is write who the card is To From on the back side. 30 cards included, so there are plenty to use for multiple recipients. 3. 5" x 5" so they are bigger than most store bought cards