Bologna, pork: slice, medium (4-1/2" dia x 1/8" thick) (1 oz) to Grams
Quick answer
One slice, medium (4-1/2" dia x 1/8" thick) (1 oz) of bologna, pork weighs 28 grams.
1 slice, medium (4-1/2" dia x 1/8" thick) (1 oz)28 g
Reference serving (nutrition facts)100 g
Source: USDA FoodData Central - SR Legacy (2018-04) (USDA household portion weight)