It's about 2,500 times as heavy as a Mouse
In other words, the weight of a Mouse is 0.00042 times 50 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 3,500 times as heavy as a Compact disc
It's about 4,000 times as heavy as a Battery (AAA)
In other words, 50 kilograms is 4,200 times the weight of a Battery (AAA), and the weight of a Battery (AAA) is 0.00024 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.
It's about 7,000 times as heavy as an Eye (Human)
It's about 9,000 times as heavy as a Quarter
In other words, 50 kilograms is 8,818 times the weight of a Quarter, and the weight of a Quarter is 0.0001134 times that amount.(United States quarter-dollar coin) (a.k.a. Quarter dollar, a.k.a. America the Beautiful quarter, a.k.a. two bits)
The America the Beautiful series quarters, which began to enter circulation in 2017, weigh 0.00567 kilograms each. In answer to the common riddle, there are 119 ridges around the edge of the coin in its current design.
It's about 10,000 times as heavy as a sheet of Paper
In other words, the weight of a sheet of Paper is 0.0001 times 50 kilograms.(for US Letter, a.k.a. ANSI A; 215.9mm by 279.4mm (8.5 in x 11 in); 20lb)
The weight of a ream (500 sheets) of 9.10 kilograms, 8.5 inch x 11 inch paper is 2 kg, each sheet weighing 0.005 kilograms. Paper of this size has a thickness of 0.004 caliper (0.1 mm).
It's about 10,000 times as heavy as a Die (Dice)
In other words, 50 kilograms is 12,000 times the weight of a Die (Dice), and the weight of a Die (Dice) is 0.0000830 times that amount.(for six-sided, 16 mm, rounded cube)
A die, of the size most commonly used in board games and casinos, typically weight 0.0041 kilograms. The use of dice and dice-like tools predates written history, with the oldest known examples belonging to a 5,000-year old backgammon set uncovered during an archaeological dig in modern-day Iran.