I am apparently a putz. A complete dolt. I can't seem to get mine to be square - I have tried twice now - starting with 18x9 pieces and I can't seem to make my inner square cut outs to be the right size to make it all square and I am really upset with myself - can it possibly be that big of a challenge for me? Obviously so...
Anyone out here can help the math challenged?
My first one I did - started with 18x9 piece - folded so that it was a 9x9 square. I cut out 3x3 squares - and made my "I" shape.. nope.. made a tall skinny rectangle... not a cool square..
So my second one I thought I would try it a bit different - I cut out 1 1/2"x1 1/2" squares to make my "I" shape - yup. Another rectangle shaped bottom.
What on earth am I doing wrong???
This would be easier if I could draw it out, but I'll do my best to explain...
You need to envision it in three dimensions to get it to be a square. Let's say you want a 9" square:
The width of the fabric would need to be 19 inches wide. This would give you 9 inches across the front of the, plus 4.5 inches on each side for half of the side depth, plus 0.5 inch seam allowance on each side.
The length of the fabric would need to be 29 inches long. This would give you 9 inches down each side (18 inches total), plus 9 inches for the bottom width, plus a 0.5 inch seam allowance at each end, and at the corners.
The trickiest part is figuring out how big to cut the squares. I think that if you cut 5.5 inch squares (which would allow for 0.5 inch seam allowances), you might be all set.
If I had the time, I'd try one out to see if my math was any good. But, I don't have time to play with it tonight. The only place I'm worried about it not being 100% correct is in the corners...with my seam allowances...
Note: If you don't have a length of fabric that is 29" long for the length, you can cut it in half (14.5 inches) but you'd need to add another 0.5 inches for when you have to seam it together, so 15" altogether.