Don't forget, you have to add a whole inch and not just a half inch to come out the same size block. Remember, you add half and inch all around to allow for the 1/4 inch seams. (12 1/2 inch blocks make 12 inch blocks finished as stated above)
Originally Posted by
Tartan
You hit the nail on the head, how to do this? All patterns are made for the 1/4 inch and I'd rather get my 1/4 inch right then do the math to figure out the changes. If you like to use 1/2 inch seams than go for it just use graph paper to draw out the block pieces plus 1/2 inch. Good luck.