They are fine with me Kass. It's hard to get them the true F8 size, the fabrics vary so much in width anymore and it seems the salvaged ends are all different I've had some that are a 1/4 inch and some up to 1 1/4 inch ...big difference on the cuts. When I've bought F4's lately they are all short fabric. I cut mine for this swap about 1/2 to 1 inch larger than the 18 because they are about 10 1/2 or 10 3/4 inches wide.