To get accurate sizes from PDF patterns you have to make sure your printer IS set to "No Margins", and NOT set to "Change Size to Fit". They are two separate settings in the 'Preference' and 'Advanced' tabs on the screen that pops up where you would select how many copies you want, etc, before you would click 'PRINT' and start the actual printing job (that's how it is for my HP printer). After printing you have to make sure that 1" box is exactly 1" on all sides or your pattern will be inaccurate.