It's about as heavy as a Hamster
(for Syrian hamster, a.k.a. golden hamster, a.k.a. Mesocricetus auratus; adult)
An adult Syrian hamster has a typical weight of about 0.20 kilograms. Known for transporting food in the pouches of their cheeks so that they can bury it later, some hamsters can store up to 25 kg of food in their borrows.
It's about one-and-one-fourth times as heavy as a Billiard Ball
In other words, 0.20 kilograms is 1.22692041563760 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 0.815048789843740 times that amount.(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 0.15592237718750 kilograms and 0.170097138750 kilograms. According to legend, the difficulty in obtaining elephant ivory for the manufacture of billiard balls in the 19th century inspired the search for a replacement material, which led to the development of the first industrial plastic.
It's about one-and-one-fourth times as heavy as a Puck (Hockey)
In other words, 0.20 kilograms is 1.22692041563760 times the weight of a Puck (Hockey), and the weight of a Puck (Hockey) is 0.815048789843740 times that amount.(Ice hockey)
A standard ice hockey puck weighs between 0.15592237718750 kilograms and 0.170097138750 kilograms. Hockey pucks can be shot or passed at speeds of up to 160 kph (99 mph) during games.
It's about one-and-two-fifths times as heavy as a Baseball
In other words, 0.20 kilograms is 1.3765448565690 times the weight of a Baseball, and the weight of a Baseball is 0.726456530078120 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 0.1417476156250 kilograms and 0.148834996406250 kilograms. A major league pitcher can throw a baseball at up to 150 kph (91 mph) (with a fastball pitch), with record-setting pitches as fast as 171 kph (106 mph).
It's about one-and-a-half times as heavy as a Battery (D)
In other words, 0.20 kilograms is 1.480 times the weight of a Battery (D), and the weight of a Battery (D) is 0.6760 times that amount.(Alkaline)
A "D" size battery weighs 0.1350 kilograms. The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about two-thirds as heavy as a Human Heart
It's about three-fifths as heavy as a Can of Soup
In other words, 0.20 kilograms is 0.570 times the weight of a Can of Soup, and the weight of a Can of Soup is 1.80 times that amount.(for Campbell''s Condensed Tomato Soup, 317.9 ml)
A can of Campbell''s Tomato Soup weighs 0.350 kilograms. Cans have been used to store soup and other foods since their invention in 1913, but a dedicated can opener was not developed until cans began to use thinner materials — prior to that time, cans were usually opened using various blunt instruments and tools.