These pyramids are the perfect size to fit in your pocket and not be annoying and you can get the use out of the crystal, or you can put it in a wallet so you always know where it is. Each of these pyramid have a different use for them. The type of crystal will determine that for you so look at them and then pick out the one that suits you best! Do you need one for protection or maybe anxiety or maybe just to sleep better? Whatever you are looking for KJsKrystals has for you!