Dimensions 125mm x 90mm Boveda Humidity Control 60 gram bag. Choose between humidity levels -72% - 75%. Please stipulate. ( 65 % - 69% sold out sorry.) Simply pop into your humidor, cigar bag or container and this will regulate your humidity to the specified level. Will last 2 to 4 months. Do not cut bag simply pop into your CIGAR humidor !! Do not mix Boveda RH levels within the same container, and do not use Boveda in the same container with other humidification products. They will fight against each other and reduce the efficiency of the Boveda. The good news is you can never use "too much" Boveda. It is the only non-electronic product on the market that will stop adding humidity when it reaches the RH level printed on the pack. The more you use, the more efficiently they will work and the longer they will last. Plastic storage containers are typically better at preventing air/moisture from entering or leaving the container. For maximum Boveda life, use a tightly sealed container. Brand new. Check out my other listings.