Inaccurate Olfa Rulers....Oh my. I have a ton of them.....will have to check them...Several years ago I bought a set of Paula Dean Measuring cups....recipes were not coming out the same.....so I used two other sets of measuring cups to compare. Paula Dean's cups were all way short of what should have been the measurement. Called them....they said take it back to WalMart. They couldn't help the issue, since they were made in China and they were no longer carrying them.....Gee wonder why. What waste of time and money.