Flip flop card. Flip Flop Beach Birthday Card. This colorful greeting card features a line of colorful flip flops on the beach. On the inside it reads, A little sun, a little sand, perhaps a friend or two... Whatever makes a perfect day is what I wish for you. Happy Birthday". Measures 7 1/4" x 5 1/2". Decorated envelope included. Made in the USA with recycled paper. Artwork by Paul Brent.