These are 1.25" to 1.5" two-hole mule deer antler buttons. The buttons have a groove between the holes to accommodate the cord to attach the button.
The buttons do not all look the same. You will get something similar to what is shown in the photos. See the last photos for an idea of the variation to expect.
The buttons are made from mule deer antler crowns that have been hand selected, polished, and drilled with a groove between the holes. These buttons are in high demand from moccasin boot manufacturers and are suitable for other craft projects as well.
A USFWS export permit is required for all shipments outside of the USA.