After using the same long, 5" wide ruler for 10 years, I broke down and bought a new 6" wide Omdngrid. It has The yellow-green markings. I tried using it, and went back to my old one, which has all black markings, and a lip that catches on the side of my cutting board. I couldn't read the new markings as well, but will keep trying it until I can. :lol: :lol: Rulers are not cheap anymore, and I have several squares that i use to square up, and to check my squares for sizing. I have had to replace my 6 in one twice, have worn 2 of them out. But the long one with black marking is still my favorite.