It's about one-one-hundred-fiftieth as heavy as a Football (Soccer).
In other words, the weight of a Football (Soccer) is 170 times 39 grains.(a.k.a. Soccer, a.k.a. Association Football) (FIFA Law 2 specification)
According to FIFA's Law of the Game number 2, a football must weigh between 6,300 grains and 6,900 grains. An artifact on display at the Smith Art Gallery in Museum in Stirling, Scotland is said to be the world's oldest football and is about one-third to one-half the size of a modern football.
It's about one-two-hundred-fiftieth as heavy as a Basketball.
In other words, 39 grains is 0.0040519480519 times the weight of a Basketball, and the weight of a Basketball is 246.79487180 times that amount.(NBA official ball standards, Size 7)
A regulation NBA basketball, manufactured by Spalding, is known as a Size 7 ball and weighs 9,625 grains. These balls have 4,118 pebbles each with a diameter of 2.5 mm
It's about one-four-hundredth as heavy as a liter of Water.
In other words, 39 grains is 0.002527087 times the weight of a liter of Water, and the weight of a liter of Water is 395.71250 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 15,432.790 grains 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).
It's about one-five-hundred-fiftieth as heavy as a Human Brain.
In other words, 39 grains is 0.00187 times the weight of a Human Brain, and the weight of a Human Brain is 535 times that amount.(adult)
The average weight of an adult human brain is between 20,800 grains. 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 550 times as heavy as a Grain of Sand.
In other words, the weight of a Grain of Sand is 0.0018 times 39 grains.(medium grain)
With tremendous variety in the size of grain and the component material, grains of sand weigh an average of 0.068 grains. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 15.10 m (49.55 ft) in height.
It's about 700 times as heavy as a Sesame Seed.
In other words, 39 grains is 694 times the weight of a Sesame Seed, and the weight of a Sesame Seed is 0.00144 times that amount.(Sesamum indicum)
A sesame seed weighs approximately 0.0562 grains. The McDonald's Big Mac sandwich, which is well-known for its sesame seed top bun, accounts for the consumption of an estimated 31,000,000 grains of sesame seeds each day.
It's about one-nine-hundredth as heavy as a Chihuahua.
In other words, 39 grains is 0.00112 times the weight of a Chihuahua, and the weight of a Chihuahua is 893 times that amount.(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 34,700 grains. Relative to their body sizes, Chihuahuas have the largest brain size of any dog breed.