Here is a list of the most common marijuana measurements used by rappers in hip-hop/rap music. Marijuana is formally measured by an ounce. Below is a complete weed measurements guide: Marijuana quantities and weights.
3.5 grams = Eighth (1/8 oz)
7 grams = Q or Quarter (1/4 oz)
14 grams = Half (1/2 oz)
28 grams / 1 ounce = Zip, Ounces, Zs, Oz, Os (1 oz)
35 ounces = Ks, Kilos