It's about thirty times as big as a Tennis Ball.
In other words, 50 deciliters is 31.750 times the size of a Tennis Ball, and the size of a Tennis Ball is 0.0315 times that amount.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must measure 6.54 cm to 6.86 cm in diameter, for a total volume of 1.5750 deciliters. Competition balls are also tested for bounce height, with the standards requiring that a ball dropped from 254 cm must bounce back to a height of 135 cm to 147 cm.
It's about twenty times as big as a Baseball.
In other words, 50 deciliters is 23.767133760 times the size of a Baseball, and the size of a Baseball is 0.04207490941 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must measure between about 2.017333416 deciliters and 2.1901575260 deciliters. A major league pitcher can throw a baseball at up to 150 kph (91 mph) in a fastball pitch.
It's about fifteen times as big as a Baseball (packed).
In other words, 50 deciliters is 15.2109660 times the size of a Baseball (packed), and the size of a Baseball (packed) is 0.065742044 times that amount.(64% packing density) (MLB rules)
Per Major League Baseball rules, a baseball must measure between about 2.0173334 deciliters and 2.19015750 deciliters. A major league pitcher can throw a fastball at up to 150 kph (91 mph).
It's about ten times as big as a Blood Donation.
It's about eight-and-a-half times as big as a STARBUCKS Venti Coffee.
In other words, the size of a STARBUCKS Venti Coffee is 0.120 times 50 deciliters.A STARBUCKS Venti coffee drink measures 5.90 deciliters. The name of the size, Venti, is the Italian word for twenty.
It's about three times as big as an Ostrich Egg.
In other words, 50 deciliters is 3.064 times the size of an Ostrich Egg, and the size of an Ostrich Egg is 0.32640 times that amount.(Struthio camelus) (for common ostrich; average)
The largest egg produced by living birds, ostrich eggs measure about 16 deciliters in volume. The eggs take about nine weeks to hatch, with males and females taking turns incubating them.