Choosing between Boveda 58% RH and 62% RH is a personal preference depending on the humidity level where you are. Difficulty deciding between 58% and 62% RH? Try one of each Boveda to decide. Size 8 Boveda fits in small containers. Experience for yourself how much better it is with Boveda! Note: Do not mix different Boveda RH levels within the same container. And do not use Boveda in the same container with other humidification products because they will fight against each other and reduce the efficiency of Boveda.