Glass Gem Size Medium 17-19mm - (approx. ¾") Best Quality Glass Gems, Vase Fillers, Flat Marbles, Aquarium Stones Other Beautiful Colors and Sizes Available on our store 1 LB Fill 1-1¼ cup Top Quality product for craft, toys, decorations, games and more. There are so many times where this glass gems can help you to achieve a unique and memorable result to your projects. Combine this mosaic glass gems and enjoy the creation of a whimsical mosaic art or use them in centerpieces to add to your decorative adventures.