These 90 COE dots and are made from Bullseye Glass! Compatible with many 90 COE glasses! * 6mm diameter dot size measures between 2mm-3mm thick! Made in the USA! * 1/2oz bag averages between 80 and 90 pieces each bag. While dot diameter remains consistant, dot thickness will vary from piece to piece. * Primarily used in warm glass kiln forming, but can be used as is in other projects such as mosaic designs as well! * Wonderful, interesting and dynamic new dots for all your warm glass kiln projects! Never worry about fusing perfect rounds again!