I create my murrini from a variety of COE 104 glass. With a black stunning background and stripes of blue and green. The background on this murrini really shows nicely on light backgrounds. Sizes 3mm-7mm with average of 5-6mm. This murrini comes in packages of 20+ (I always throw in a couple extra). It has a smooth melt, will not scorch and melts evenly on enamels.