It takes 23 softballs to fill a treasure chest. Piled up, they form a heap 26 in (65.9 cm) wide and 6.9 in (17.5 cm) tall, which is about the size of a 5-gallon bucket.

To fill a treasure chest
about 23 softballs
20 liters of space
about the size of a 5-gallon bucket
Size and weight estimated by AI from typical values. Sizes and weights are typical for an adult or standard softball; real ones vary.