Quiltmaker has a quilt that has the letters in a sq on point with nine patches around it. Here is the link to the pattern page. You might be able to figure it out on your own. Note that the center block equals the size of a solid sq and a nine patch. Make the squares 1st then you will know what size you need for the middle.
http://www.quiltandsewshop.com/produ...maker-patterns