Lettuce, iceberg (includes crisphead types), raw: cup shredded to Grams
Quick answer
One cup shredded of lettuce, iceberg (includes crisphead types), raw weighs 72 grams.
1 cup shredded72 g
Reference serving (nutrition facts)100 g
Source: USDA FoodData Central - SR Legacy (2018-04) (USDA household portion weight)