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Aspect Ratio and Ring Sizing

Important Information About Our Chainmail Rings

Please note that the titles and part numbers for our rings use two important conventions:

1.  The gauge used for all of our rings is the approximate Standard Wire Gauge of the wire used to make the ring.

Because not all wires are available in Standard Wire Gauge (brass, bronze, copper, nickel silver, to name a few), we convert the actual diameter to the closest SWG equivalent.  This means there are slight differences between, say, 18g wires.  For instance, 18g brass on our site has a diameter of 0.051", while 18g aluminum has a diameter of 0.048".  While the 3 mil (0.003") difference isn't very much, it can be enough to throw off weaves which have a very finicky Aspect Ratio (more on that below) requirement.  To make it clear which is which, wires having a diameter closer to the 0.051" are denoted as "18A" while true 18SWG wires are denoted as simply "18."

2.  The ring diameter noted is the mandrel diameter - that is - the diameter of the mandrel on which the ring is wound.  In theory, this would also be the inside diameter of the ring, except for a phenomenon known as "springback," which causes the coil to unwind and expand slightly when the winding tension is released.  In most cases, we have measured the actual ring and included that measurement in the ring data.  Again, the difference is usually fairly slight (less for soft materials, more for hard materials), but can sometimes cause trouble in size-sensitive designs.

The bottom line is this:  Please review the actual link data for a given ring if you have tight requirements, remember that all gauges are SWG, and all diameters are theoretical inside diameters (mandrel diameters).

 

ASPECT RATIO

Aspect Ratio is a unitless value which compares the inside diameter of the ring with the diameter of the wire it is made from.  


 

 

 

 

 

 

 

 

 

Knowing the Aspect Ratio of a given ring is helpful as it is the Aspect Ratio which determines which weaves can be constructed with that ring.  If you know the aspect ratio for a ring you have used for a design, and you wish to scale the design up or down, simply look for larger or smaller gauge or diameter rings which have close to that same aspect ratio.

Here is an example of some aspect ratios which work well for certain weaves:

 

Weave Typical Aspect Ratio
European 4-1 ~4.0 - 6.0
European 6-1 ~4.5 - 6.5
Full Persian ~5.5 - 6.5
Half Persian 3-1 ~4.0 - 5.5
Half Persian 4-1 ~5.0 - 6.5
Jens Pind Linkage (JPL) ~3.0
Byzantine ~3.5 - 4.5

 

For all weaves, there is a theoretical minimum aspect ratio below which the weave will not work.  Most weaves can always be made with larger ARs (though some, like JPL, can become unstable), but at some point they become less aesthetically pleasing.