"Raku River 3" Bead -

showing width and diameter in inches and mm

11mm x 19 mm - with a 3/8" hole

Beads are measured and listed by millimeters for most catalogs and books. For many of us, thinking in meters does not come naturally. For this reason, I am including the above examples for reference purposes. If you are ordering beads, please be sure you have a clear idea of the size.