It's about as heavy as a Football (American).
In other words, the weight of a Football (American) is 1.016626602564 times 260 pennyweights.(a.k.a. "pigskin") (NFL standard)
It's about nine-tenths as heavy as a Football (Soccer).
In other words, 260 pennyweights is 0.94 times the weight of a Football (Soccer), and the weight of a Football (Soccer) is 1.1 times that amount.(a.k.a. Soccer, a.k.a. Association Football) (FIFA Law 2 specification)
It's about one-and-one-fifth times as heavy as a Can of Soup.
In other words, the weight of a Can of Soup is 0.83 times 260 pennyweights.(for Campbell''s Condensed Tomato Soup, 317.9 ml)
A can of Campbell''s Tomato Soup weighs 230 pennyweights. 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-three-tenths times as heavy as a Human Heart.
In other words, the weight of a Human Heart is 0.77 times 260 pennyweights.(human; adult)
It's about two-thirds as heavy as a Basketball.
In other words, 260 pennyweights is 0.64831168831 times the weight of a Basketball, and the weight of a Basketball is 1.5424679487 times that amount.(NBA official ball standards, Size 7)
It's about two times as heavy as a Hamster.
In other words, the weight of a Hamster is 0.5 times 260 pennyweights.(for Syrian hamster, a.k.a. golden hamster, a.k.a. Mesocricetus auratus; adult)
It's about two-fifths as heavy as a liter of Water.
In other words, 260 pennyweights is 0.4043339 times the weight of a liter of Water, and the weight of a liter of Water is 2.473203 times that amount.(fresh; 4° C / 39.2° F; maximum density)
Contrary to popular belief, 1 liter (0.0.264172052358148 gal) of water at 4° C / 39.2° F (its point of maximum density) weighs 643.0329 pennyweights rather than 1 kg exactly. The total volume of water on the planet Earth is about 13,590,000,000,000,000,000 (13.59 quntillion) L (3,590,000,000,000,000,000 gallons).