These old beads measure 4mm round. These are flat on one side for easy sew on and faceted on the other. Early 1900's. The deep opaque green is a rare color. Originally used as glass sequins. Wow - Think of the possibilities for their use now. We believe these are very very old beads. Look at the primitive cuts and you will agree. Are you looking for just the right color green? These may just fit the bill for your next beading project.