It's about 6,000 times as heavy as a Tennis Ball.
In other words, 343 kilograms is 5,940 times the weight of a Tennis Ball, and the weight of a Tennis Ball is 0.000168 times that amount.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 0.0577 kilograms. 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 7,500 times as heavy as a Golf Ball.
In other words, 343 kilograms is 7,468 times the weight of a Golf Ball, and the weight of a Golf Ball is 0.0001339 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 0.04593 kilograms. 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 10,000 times as heavy as a Light Bulb.
In other words, the weight of a Light Bulb is 0.0001 times 343 kilograms.(a.k.a. lamp) (for A19-size, 60w, incandescent bulb by Bulbrite; package weight)
A standard, sixty-watt light bulb weighs about 0.034 kilograms. The tightly-coiled filament inside a bulb of this size would measure about 579mm if uncoiled and stretched out.
It's about 15,000 times as heavy as a Battery (AA).
In other words, the weight of a Battery (AA) is 0.0000710 times 343 kilograms.(Alkaline)
An "AA" size battery weighs 0.024 kilograms. 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 15,000 times as heavy as a Mouse.
In other words, the weight of a Mouse is 0.0000630 times 343 kilograms.(a.k.a. "House mouse", Mus musculus) (adult)
The weight of a mouse is typically an average of 0.021 kilograms. 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.
It's about 25,000 times as heavy as a Compact disc.
It's about 30,000 times as heavy as a Battery (AAA).
In other words, 343 kilograms is 29,000 times the weight of a Battery (AAA), and the weight of a Battery (AAA) is 0.0000340 times that amount.(Alkaline)
An "AAA" size battery weighs 0.012 kilograms. Batteries are named by the American National Standards Institute (ANSI) Committee C18 and AAA batteries were given their name because they were smaller than the "AA" and "A" size batteries which were invented first.