Hi, Boop56!! Welcome. This will be my 2nd time participating and these gals are the best to hang with. The size is really up to you as long as it is larger than a mug rug and smaller than a lap quilt. So, go for it. My WH in the swap that just ended was 16"'square but this time my WH will measure out about 10x20"rectangle...at least..that is the plan. I personally don't have a preference but others may and may respond differently. Have fun and looking forward to chatting with you...