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Originally Posted by
krafty14
If you do the disappearing 9 patch using 5" charms, after you cut the block in to 4, the resulting blocks will be 7", exactly the same as the original block mentioned. If you cut a charm in half you will have (2) 2.5 x 5 for the sides. If you cut a charm into 4, you will have 2.5 x 2.5 for the cornerstone.
after allowing for 1/4 inch seams, the "finished" size of the ABCD unit will be 6-1/2 inches. the "unfinished" size of the ABCD unit will be 7 inches.
the original poster sent a pm to me that she wanted to make 9 inch ABCD units, that is what the last drawings were for.