This three piece hot plate mat set is very simple and easy to crochet using one basic block. The model was made from Lily Mills Cotton Rug Yarn, 2 skeins each of white and a color. Using a size O steel crochet hook, the block measures about 3 1/2 inches across. Work tightly for best results. The photograph shows the large mat (10 blocks); charts give arrangement for small and medium sizes.