Cereals ready-to-eat, POST, ALPHA-BITS: cup (1 NLEA serving for adults) to Grams
Quick answer
One cup (1 NLEA serving for adults) of cereals ready-to-eat, post, alpha-bits weighs 30 grams.
1 cup (1 NLEA serving for adults)30 g
Reference serving (nutrition facts)100 g
Source: USDA FoodData Central - SR Legacy (2018-04) (USDA household portion weight)