Just to make it a bit easier to create flags of many sizes, I produced a spreadsheet based on the “length” (or Fly) of the American flag.
PDF SAMPLE OUTPUT
AmericanFlagSpecifications2020.ods.pdf (91.6 KB)
OPEN DOCUMENT SPREADSHEET
AmericanFlagSpecifications2020.ods.zip (80.2 KB)
Thanks to @gdon_2003 for the idea.