These are great screens for washing your tumbled stones since they will fit to the top of most 5 gallon buckets. We stock a variety of sizes for most any screening or classifying job. The 1/4″ and 1/8″ screens are great for washing the grit from tumbled stones. They are a must for proper fine gold or other gemstone recovery. They measure 12″ wide at the top and are tapered to fit in the top of a 5 gallon bucket. The overall height is 3 1/2″ and they are designed to allow 4 of the classifiers to be nested together with an overall height of only 6 1/2″.