I bought the one for the 10" square & the one for the 5" square. I've only been able to make some practice pieces, 'cause I've got so many WIPS. There is some waste but if you cut carefully the extra piece can be used to make the smaller twister block. For instance the Twister for the 10" block has an almost 5 " block left. I did one block with the large tool, then took the waste & added other fabric to make a 4 block piece with the other tool. Clear as mud? It does look like I will have to be careful sewing 'em in order. The directions do say to only cut one row out at a time. I think that when I make this quilt it will be neat. I hope this helps.