I can't say for a fact, but my sister-in-law bought a pack of these and sewed two strips together, then cut them into 5 in strips and attached them to the 5in pre cut packages of squares...then we set the pattern she wanted to make on the design wall...as she was sewing them together, some were cut smaller than most of them...We don't know whether the 2 1/2 in strips were cut short or the 5 in blocks were short...but in either case both were pre cut items.... so it is caution in all of the precut packages....