Questions about Wire guages

First of all, is copper #1 anywhere from size 16 up to 0? Iv heard that but just want to confirm it so i my seperation of wires can be made easier.
And my next question is, say i have a size 12 wire made up of stranded wire..does that still count as a 12 gauge #1 copper wire or no?

Up here in northern Indiana at our little scrapyard, the 12 ga. would be considered #1 if it was cleaned of it's insulation. I still strip out CB coaxes and it all goes for clean #1 also. Mike

If anyone else out there reads this i would still like to know if stranded wire (made up of very fine wire) can still be copper #1 if its in the guage range. I havnt recycled much so im not sure