It's about one-fifth as heavy as a Human Brain
In other words, 250 grams is 0.1850 times the weight of a Human Brain, and the weight of a Human Brain is 5.410 times that amount.(adult)
The average weight of an adult human brain is between 1,300 and 1,400 g. In humans and primates, sight and vision utilize about 30 different parts of the brain which together account for about half of the brain's size.
It's about five-and-a-half times as heavy as a Golf Ball
In other words, 250 grams is 5.4430 times the weight of a Golf Ball, and the weight of a Golf Ball is 0.18370 times that amount.(per R&A USGA Rules of Golf; maximum rule weight)
According to the Rules of Golf (as approved by the United States Golf Association and the Rules Committee of the Royal and Ancient Golf Club of Saint Andrews), golf balls must weigh no more than 45.93 g. Golf balls are not required to have the familiar dimpled pattern, but the design has been popular since its invention in 1905 because it reduces drag while increasing lift.
It's about seven-and-a-half times as heavy as a Light Bulb
In other words, the weight of a Light Bulb is 0.140 times 250 grams.(a.k.a. lamp) (for A19-size, 60w, incandescent bulb by Bulbrite; package weight)
A standard, sixty-watt light bulb weighs about 34 grams. The tightly-coiled filament inside a bulb of this size would measure about 579mm if uncoiled and stretched out.
It's about one-tenth as heavy as a Chihuahua
In other words, 250 grams is 0.1110 times the weight of a Chihuahua, and the weight of a Chihuahua is 9.01 times that amount.(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 2,250 grams. Relative to their body sizes, Chihuahuas have the largest brain size of any dog breed.
It's about ten times as heavy as a Battery (AA)
In other words, the weight of a Battery (AA) is 0.10 times 250 grams.(Alkaline)
An "AA" size battery weighs 24 g. AA batteries came into common use during World War II and were given their name by the American National Standards Institute (ANSI) Committee C18 because they were smaller than the "A" size batteries which were invented first.
It's about one-tenth as heavy as a Brick
In other words, the weight of a Brick is 12 times 250 grams.(Standard, traditional face brick - 1,900 cu. cm (120 cu. in))
A standard, traditional face brick weighs an average of 2,900 grams. The steeple of the Church of St. Martin in Landshut, Germany is said to be the tallest brick tower in the world at a height of 130.6 m (428.5 ft) and was constructed using an estimated 650,000 bricks.
It's about twelve times as heavy as a Mouse
In other words, the weight of a Mouse is 0.083 times 250 grams.(a.k.a. "House mouse", Mus musculus) (adult)
The weight of a mouse is typically an average of 12 to 30 g. While most mice typically live two to three years, the Methuselah Mouse Prize — an award administered by a non-profit organization which advances aging-related research — was once awarded to a team of scientists whose research resulted in a mouse living just under five years.