It's about as heavy as a Hamster
It's about four-fifths as heavy as a Human Heart
It's about seven-tenths as heavy as a Can of Soup
In other words, 250 grams is 0.71 times the weight of a Can of Soup, and the weight of a Can of Soup is 1.4 times that amount.(for Campbell''s Condensed Tomato Soup, 317.9 ml)
A can of Campbell''s Tomato Soup weighs 350 g. 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.
It's about one-and-a-half times as heavy as a Billiard Ball
In other words, 250 grams is 1.533650519547 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 0.65203903187499 times that amount.(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 155.9223771875 g and 170.09713875 g. 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-a-half times as heavy as a Puck (Hockey)
In other words, 250 grams is 1.533650519547 times the weight of a Puck (Hockey), and the weight of a Puck (Hockey) is 0.65203903187499 times that amount.(Ice hockey)
A standard ice hockey puck weighs between 155.9223771875 g and 170.09713875 g. Hockey pucks can be shot or passed at speeds of up to 160 kph (99 mph) during games.
It's about three-fifths as heavy as a Football (American)
In other words, 250 grams is 0.6081717577514 times the weight of a Football (American), and the weight of a Football (American) is 1.64427234125 times that amount.(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 396.89332375 g and 425.242846875 g. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.
It's about one-and-seven-tenths times as heavy as a Baseball
In other words, 250 grams is 1.7206810707112 times the weight of a Baseball, and the weight of a Baseball is 0.58116522406251 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 141.747615625 g and 148.83499640625 g. 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).