Boveda comes in three sizes for cigars.
The capacity of the cigar humidor determines how many and what size Boveda you use. (In other words, how many cigars the manufacturer said your humidor can hold.)
Size 8: Use one size 8 for every 5 cigars a humidor can hold. Ideal for smaller travel humidors and cigar case.
Size 60: Use (1) Size 60 for every 25 cigars your container can hold. Example: For a 125-cigar capacity humidor, use five (5) Size 60 Boveda at once. Ideal for small to medium humidors, tupperdors, coolerdors, and travel cases. Also used for refilling medium and large Boveda Humidor Bags.
Size 320: Use (1) Size 320 for every 100 cigars that your humidor, wineador, cooler, or tupperdor is designed to hold. Ideal for more condensed power for a wineador or larger humidor, cooler or tupperdor. In a 25-count humidor, the Size 320 can provide cigar protection for up to 1 year. (1) Size 320 provides the same power as (5) Size 60.