Pot diameter

[Forked lighting]

Does anyone know why 3.5 in" became standard for pots just curios

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[doublespurs21]

  most of the playing surface are all 3.5 inches in dia... glass, slate and all the other playing surface and most sound boards are 3 inches in dia, as for why, I do not know that part....

[M,Yingling]

 I use to build a lot 3in surface calls  I would say its easyer to get a turkey sound from a 3.5 surface then a 3in surface   With 3in call you eather got it or u don't had many that just didn't make the cut

[Ericbrooks]

I prefer 3" personally, they fit in my hand better.
My 3" Yingling copper is #1


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[pauld]

I build a 3.25 and 3" as well. 3.5" is just the standard

[Double B]

Smaller is usually higher pitch and struggle with  roll over in my experience.  I prefer 3.5, but have some 3.25 as well.  Below that they get tough for me to work with.  The larger size gives more area and find a bigger sweet spot.

[howl]

Volume, pitch and easier to build for the way most run a call