Crystal beads (Drills) are much like regular drills although they have a glass like look to them. They are still acrylic drills. They do not have the same DMC number as the regular or AB drills. Please use the below guide for your reference.
First number is DMC, second is the corresponding crystal number.
Small bag 950 Drills (6.25 Grams)
Large Bag 1900 Drills (12.5 Grams)