Price listed is for one ounce of mixed acrylic stones. These are round acrylic stones that measure 16 and 23mm. These stones have smooth round tops and partially drilled backs. They are blue, black, white, and red in color. The smaller stones have flat backs and the larger ones have concave backs with an 8mm pad. A sample ounce pulled had 13 stones. The white stones appear to have slightly yellowed. We can not guarantee the number or color of pieces you will receive, only the weight.