Food AOnion, rawServing 100 g (100 g) onion, cup, chopped (160 g) onion, cup, sliced (115 g) onion, tbsp chopped (10 g) onion, large (150 g) onion, slice, large (1/4" thick) (38 g) onion, medium (2-1/2" dia) (110 g) onion, slice, medium (1/8" thick) (14 g) onion, small (70 g) onion, slice, thin (9 g) onion, rings (60 g)