I updated another one! Not only can you make this dishcloth in 2 sizes (small and large) but I did a little math and resized it to make coasters too!
If you would like to read the pattern, it's written out in full on my website here - Diamonds Dishcloth and Coasters – FREE Knitting Pattern I've added all the photos you'll need to make this so it's sorta long, but I wrote it both with and without photos to make it faster to follow for the experienced knitter.