There is a total of 19 Beautiful GLASS CRYSTAL Rectangular Prisms NOT ACRYLIC.    The measurements are approx 2.5 inches long , 1 inch bottom and .75 inch top.   They also have a hole at the top and bottom.  They are cut in a faceting pattern to increase their beauty and reflectivity.  Very Good Vintage Condition.   Smoke Free Home. The price is for 3 prisms.  The price is $5.00 for 3 rectangular prisms.  Can buy 3 or as many as you need.  12 prisms a re in stock