The most common types of Crystal Tumblestones are all sold as individual stones in different weight sizes.
X Small 5 - 9 grams
Small 10-14 grams
Medium 15-19 grams
Large 20-25 grams
Some stones come in fairly consistent sizes, so may not offer a variation on sizes, whilst others can vary greatly, offering a range of sizes to choose from.
Simply select the size & quantity of each stone & weight from the drop-down menu.