While the phrase "dime sack" is used to describe the cost of a substance, the type of substance being sold in the container varies. Additionally, this phrase is most commonly used when purchasing or selling illegal substances. For these reasons, there is no official weight measurement for a dime sack.
A dime sack, also commonly referred to as a dime bag, was popularized in the 1960s by people who were buying and selling marijuana. In Denver, Colo., where marijuana is legal for recreational use, the median cost of the substance was $242 per ounce (including taxes) as of July, 2014. Using this as a benchmark, one can expect to receive slightly more than one gram of marijuana from a dime sack purchased in Denver.