"Love these mats!"
I use 4 for the use they were designed for, but always cut one in half and round cut the corners (otherwise they'd be really sharp) to make 2 small mats - so much easier when just needing a small chop of say an apple and the 5th one - always the clear one, to put on my dressing table to protect it from makeup spills. I slide the end with the loaf of bread symbol on it, under the dressing table mirror so it can't be seen and it works a treat :)