Over the next several weeks I will be adding the drill hole size to all beads in my Etsy shop. Look for this information in the product descriptions. Measurements will be listed in Brown & Sharpe aka American Wire Gauge (AWG).
Please keep in mind I will be listing the largest gauge that comfortably passes through the bead. Occasionally manufactures may use different machines to create batches of beads, which means the drill hole sizes may vary slightly. However, I will do my best to test several beads to provide an accurate measurement.