I believe the letters are referring to FABRIC not size/shape of block. If you go to the cutting page, it the fabrics labeled from A to H. Hope this helps.
It is always a good idea to check the amounts of fabric provided in a kit, against the amount listed on the pattern, just in case a mistake has been made. You can then also see how each fabric is used in the pattern. Pretty pattern. Which colourway did you choose?
Last edited by GingerK; 01-26-2014 at 10:06 AM.