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# Simplified Gauge to Inner Diameter Ratio ChangesArticle © MAIL User: Coyote

I wrote an article that explains an accurate process by which you can maintain your gauge to inner diameter ratio when changing guage or inner diameter size. I recently decided to add this bit of revised information to make the process easier. Most people use gauges ranging from 20 to 12 and use mandrel bars ranging from 3/16 to 1/2 inch in 1/16 of an inch increments so the information below can be more easily applied than the equations in my previous article.
This information breaks down to 2 gauges= 1/16 of an inch.

DOUBLE GAUGE CHANGES.
This shows what the new inner diameter will be when you change gauge.

20G 3/16 inch
18G 1/4 inch
16G 5/16 inch
14G 3/8 inch
12G 7/16 inch
10G 1/2 inch

In other words, if you started with 16g 1/4 inch rings and you wanted to use 14g rings but keep the same density to the weave, you would add 1/16 of an inch to the inner diameter size. If by some chance you are also using odd numbered gauges as well as even and you are only changing by one gage you would only increase the inner diameter by 1/32 of an inch.

SINGLE GAUGE CHANGES.

20G 3/16 inch
19g 7/32 inch
18G 1/4 inch
17G 9/32 inch
16g 5/16 inch
15g 11/32inch
14g 3/8 inch
13g 13/32inch
12g 7/16 inch
11g 15/32inch
10g 1/2 inch
9g 17/32inch

The above information can be broken down to 1 gauge=1/32 of an inch.

I admit that this is not the most accurate way to convert gauge to inner diameter ratios, but it is based on the gauges and inner diameters that are used commonly in the production of mail.
Original URL: http://www.mailleartisans.org/articles/articledisplay.php?key=86