Ring Size--how to measure it?

[Eins]

I measured the circumference in mm but these numbers are much greater than what the ring size should be. So, how is it measured?

 

[CoventryCat86]

Ring size is diameter in 64ths of an inch.

A 48 ring cigar is 3/4" in diameter

 

[Eins]

Thanks for the formula.

Aren't we lucky that they didn't base it on a logarithmic scale or, like, on Farenheit divided by Kelvin minus 32%RH.

Now I know why my brain refuses to accept any other system but metric. Cigars could be so much more fun

 

[Alph Chomper]

So I have my vernier calipers, my micrometer, my ruler, my tape measure. How do I measure the diamater of a rectangular cross section box press (as opposed to a square cross section)? Is it like an ellipse measurement, short and long diameters averaged?

PS for those pesky international foreign sites, I multiply the mm by 254 to get inches in decimal form. I leave the division by 64 to the user.

 

[CoventryCat86]

Alph,
You Fairfield County highbrows ARE INDEED whacked
Us Windham County hicks just use the el cheapo cardboard freebie ring gauges and guesstimate

 

[Eins]

So I have my vernier calipers, my micrometer, my ruler, my tape measure. How do I measure the diamater of a rectangular cross section box press (as opposed to a square cross section)?

That's geometry and since it has nothing to do with cigars, this newbie can actually contribue something:

Measure the circumference = c (a soft tape measure will work best)

Find the diameter d = c/3.14

d * 64 = ring size


edited to correct an error before some math wiz questions my formula:
c= pi * d, not 2pi * d as I had it first.