Natural Himalayan Salt Fire Bowl Lamp with Rough Salt Chunks, Cord, and Light Bulb wire wrapping The sizes are hand measured R AMETRINE 1 The sizes are hand measured and the stones you are purchasing are roughly 2 inches in length with most pieces being between 1 Each Goniatite stand up display averages 6" to 8" and is perfect for collecting The average weight per piece is around 6 pounds but again due to being hand crafted this can vary slightly and we want our customers to be aware of this prior to purchase since you can keep the bowl lit for as long as you like to maintain the purifying effect for as long as you need