It's about one-three-thousandth as heavy as a Grand Piano.
In other words, 5 ounces is 0.00031 times the weight of a Grand Piano, and the weight of a Grand Piano is 3,200 times that amount.(for Steinway & Sons, Model D Concert Grand Piano)
A Grand Piano, of the kind used for concert performances in large music halls, weighs 16,000 ounces. Well-made pianos such as this may last 75 to 100 years.
It's about one-three-thousand-five-hundredth as heavy as a Polar Bear.
In other words, 5 ounces is 0.000275 times the weight of a Polar Bear, and the weight of a Polar Bear is 3,640 times that amount.(Ursus maritimus) (adult, male)
An adult, male polar bear weighs between 18,200 ounces. Polar bears are so heavily insulated by their 9.9 cm (3.9 in) layer of blubber that they are often difficult to detect using infrared photography sensors.
It's about one-three-thousand-five-hundredth as heavy as a Grizzly Bear.
In other words, 5 ounces is 0.000272 times the weight of a Grizzly Bear, and the weight of a Grizzly Bear is 3,680 times that amount.(a.k.a. brown bear, a.k.a. silver bear, Ursus arctos horribilis) (Adult, male, coastal area population average)
An adult, male grizzly bear from a coastal area (where food is plentiful) can weigh up to 18,400 ounces. In spite of their tremendous size, grizzly bears can run at speeds of up to 55 kph (34 mph).
It's about one-five-thousandth as heavy as a Cow.
In other words, 5 ounces is 0.00021 times the weight of a Cow, and the weight of a Cow is 4,800 times that amount.(for Holstein, a.k.a. Holstein Friesian, a.k.a. Friesian, Bos primigenius) (adult, heifer)
A mature Holstein cow (the well-known black-and-white, spotted breed of cow) typically weighs 24,000 ounces. President William Howard Taft (1909 - 1913) kept a Holstein cow named Pauline Wayne on the White House grounds — a gift from a Wisconsin senator and the source of the First Family's milk.
It's about 5,000 times as heavy as a Grain of Rice.
In other words, the weight of a Grain of Rice is 0.0002 times 5 ounces.(long grain; 14% moisture content)
A single long grain of rice weighs an average of 0.001 ounces. A staple through most of human history, archaeological evidence indicates that the earliest rice cultivation was about 11,500 years ago.
It's about one-ten-thousandth as heavy as a Car.
In other words, 5 ounces is 0.00008580 times the weight of a Car, and the weight of a Car is 11,660 times that amount.(for 2009 Ford Taurus; automatic transmission; curb weight)
A 2009 Ford Taurus weighs 58,270 ounces. The first mass-produced car, the Curved Dash Oldsmobile — introduced in 1901 — weighed just 13,620 ounces.
It's about one-fifteen-thousandth as heavy as a Giraffe.