It takes 28 gummy worms to fill a standard coffee mug. Piled up, they form a heap 6.74 in (17.1 cm) wide and 1.79 in (4.55 cm) tall, which is about the size of a 12-oz soda can.

To fill a coffee mug
about 28 gummy worms
0.35 liters of space
about the size of a 12-oz soda can
Size and weight estimated by AI from typical values. Sizes and weights are typical for an adult or standard gummy worm; real ones vary.