There is one of singular and plural flashcards (regular plurals only) in two different sizes (3.2” H X 4.5” W and 3.2” H X 2.25” W). There are 80 colorful flashcards (40 for each size) of singular and plural pairs. The noun pairs are as follows: cat/cats, cow/cows, cupcake/cupcakes, flower/flowers, hat/hats, balloon/balloons, book/books, tree/trees, bee/bees, tie/ties, pencil/pencils, cookie/cookies, bubble/bubbles, monster/monsters, sock/socks, star/stars, heart/hearts, candy/candies, bear/bear