Pendant is approximately 1 1/2 inches long and 1 1/4 inch across at the widest spot. Quarter in third photo is for size reference only.
All my sea glass is machine tumbled for several days to a week (or sometimes more!) to give it smooth edges with no chips. After drilling it is tumbled again just to make sure! My glass comes from various sources, mostly from discarded bottles and jars that would otherwise end up in the landfill.