Dashington Flat Yellow Marbles, Pebbles (5 Pound Bag) for Vase Filler, Table Scatter, Aquarium Decor Dashington High Quality Decorative Smooth Glass Marbles Perfect for aquarium use, vase filler, craft projects. Translucent - Light will shine through Size is approximately 3/4" 5 pound bag contains approximately 400-500 marbles