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Easton Carbon Arrow Diameter Sizes

by Ian Weller March 02, 2017

Easton Carbon Arrow Diameter Sizes

Easton’s Metric Carbon Arrow Sizing- making a great thing… simpler.

Back in the 90’s, when Easton developed what became the world standard for carbon arrow diameter, we created the “S-Diameter” nomenclature to describe all shafts capable of accepting Easton’s popular Super Nock.  Originally the size was described as “S” for Super, and later it became popular to refer to it as “Standard”.  Pretty easy, and straightforward.  But as time marched on, and Easton kept pushing the limits of smaller and smaller diameters and higher penetration performance with products like the Injexion series shafts, the proliferation of new nomenclatures, like X, H, and G, became a little confusing for shooters and dealers alike.

Now, Easton’s have deployed a new nomenclature on carbon arrow sizes to make it easier to determine which components go with which arrows.  It’s important to note, that the actual sizes haven’t changed- and the old letter references remain-but they added a metric number to make it much easier to understand the relative diameter.

Keyed off the internal diameter of the shaft, the new metric sizing will appear on all Easton and Beman hunting shafts starting now and will be added to all hunting models throughout the 2016 season.

S (Standard)= 6.5 MM

H (Reduced)= 6 MM

X (Micro) = 5 MM

G (Ultra-Micro)= 4 MM




Ian Weller
Ian Weller

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