I create my murrini from a variety of COE 104 glass. This is a beautiful blue berry stipe mix with a bright yellow core. Sizes 3mm-7mm with average of 5-6mm. This murrini comes in packages of 20+ (I always throw in a couple extra). Sizes 3mm-7mm with average of 5-6mm. It has a smooth melt, will not scorch and melts evenly on enamels.