I have 4 of the standard grey and yellow cutting mats, they are adhered to my cutting table with double sided sticky tape to form one large surface. I too wish they would come out with better colors for the mats! I have half yellow side up half grey side up. I wish Quilters Select would make larger mats, I would buy 4 to replace the ones I have. I too am a huge fan and quilters select rulers are simply the best for cutting IMHO and creative grids for specialty rulers.