First time I have tried this block, when Jenny does it the block comes out to 12 1/2 before she cuts it to make the hour glass disappear. I have sewn 2 hourglass blocks and they are bigger. I used my 15 inch sq up ruler to measure them making sure the 45 degree line goes through the centre and the centre at 6 1/4. despite being very careful when I sewed and pressed it looks as if I am going to have to square the blocks up to 12 1/2. Has any one else had this problem????

I want to use it to demonstrate what blocks you can make from a 10 inch square.