== Sizes of rolled oatmeal == 

 I get my oatmeal from a whole foods store and it says #3 (thick) rolled oats.  And searching for oatmeal online you can buy in bulk at IFS Grain - Oats Rolled Regular (Old Fashioned #5) - https://ifsbulk.com/oats-rolled-regular-old-fashioned5 

 Is the rolled size an industry standard? And if so, how many sizes are there and how is it measured? I can't seem to find it anywhere online.  If somebody knows can they add it to the wiki article?