In 2011, we were contacted by Weta to make 40 shirts for elf armor. The assembly didn't end there though!
Eric Matwe, our staff member at the timeand now and owner of MailleTec.com, was then flown down to the set in New Zealand and got to work with Weta costumers to re-imagine the scales and how they fit with the rest of the Elven armor.
MailleTec discusses this on their site here
The scales used are small champagne anodized aluminum.
We get the most screen time in the 3rd movie.
You can see the scales in their first design as shirts at the 5:30 mark in this video
Hi-res version of this image is here