Whenever I buy Italian spaghetti like Agnesi or Barilla etc, they are labeled Spaghetti no.3 or no. 7 or Spaghettini no.11 etc... It's confusing. I suppose the numbers refer to the size of the noodle but what do they mean exactly? Do they follow a universal spaghetti sizing standard in Italy? Is anyone out there familiar with the table of spaghetti sizes, if there's one such? I hope the people from Italy can chime in. Thanks!