Akoya Shell Buttons with 2 holes (dyed Red)
20mm square (or 13/16 inches sq. if you prefer) 
These are textured on one side and smoothish on the other.
Cut from shells so have natural variations and are slightly curved.
They are dyed so may show flaking, I'd probably hit them with a sealer of some sort to protect tham from wear.
Nice addition to mixed media pieces or for jewelry making.
5 per pkg