Each geode measures roughly 1.50 inches in diameter with a general range of 1.5-1.75 inches (these geodes run a little big). Guaranteed at least 90% hollow, meaning 9 out of 10 geodes will contain an open pocket with quartz crystals. Price per geode is $1.50 plus shipping. Free shipping for all United States orders over $100 with flat, tiered rate shipping below $100. An instruction card on how to open geodes and an informational card about these geodes will be included with every order.