It's about one-and-two-fifths times as heavy as a Grain of Rice
In other words, 0.029 grams is 1.4 times the weight of a Grain of Rice, and the weight of a Grain of Rice is 0.71 times that amount.(conventional; US; long-, medium-, and short-gran varieties; uncooked)
With great differences in variety, the average among a sampling of common short-, medium- and long-grain rices finds that a single grain weighs about 0.021 grams before cooking. A staple through most of human history, archaeological evidence indicates that the earliest rice cultivation was about 11,500 years ago.
It's about six-and-a-half times as heavy as a Grain of Sand
In other words, 0.029 grams is 6.6 times the weight of a Grain of Sand, and the weight of a Grain of Sand is 0.15 times that amount.(medium grain)
With tremendous variety in the size of grain and the component material, grains of sand weigh an average of 0.0044 grams. 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 eight times as heavy as a Sesame Seed
In other words, 0.029 grams is 7.97 times the weight of a Sesame Seed, and the weight of a Sesame Seed is 0.125 times that amount.(Sesamum indicum)
A sesame seed weighs approximately 0.00364 grams. The McDonald's Big Mac sandwich, which is well-known for its sesame seed top bun, accounts for the consumption of an estimated 2,010,000 grams of sesame seeds each day.
It's about one-tenth as heavy as a Raindrop
In other words, 0.029 grams is 0.1 times the weight of a Raindrop, and the weight of a Raindrop is 10 times that amount.(a.k.a. drop, a.k.a. droplet) (average)
The weight of a raindrop depends heavily on the type of weather, but averages about 0.20 grams. The familiar teardrop shape of a raindrop is actually an optical illusion, caused by the reflection of the light and the motion of the drop.
It's about one-twenty-fifth as heavy as a Nail
In other words, 0.029 grams is 0.04 times the weight of a Nail, and the weight of a Nail is 27 times that amount.(for 15-gauge, 2-inch, finishing nails)
A two-inch finishing nail weighs 0.79 g. Nails have been in use for more than 5,400 years and were ven used as a medium of exchange in ancient times.
It's about one-fortieth as heavy as a Jelly Bean
In other words, 0.029 grams is 0.03 times the weight of a Jelly Bean, and the weight of a Jelly Bean is 38 times that amount.(for Jelly Belly beans; approximate)
Made of sugar, corn syrup, and pectin, a single jelly bean weighs about 1.10 grams. President Ronald Reagan cited jelly beans as his favorite candy and 3,200,000 grams of the candies were served at his first inauguration in 1981.
It's about 45 times as heavy as a Grain of Sugar
In other words, 0.029 grams is 46.4 times the weight of a Grain of Sugar, and the weight of a Grain of Sugar is 0.022 times that amount.(a.k.a. white sugar, a.k.a. white refined sugar, a.k.a. table sugar, a.k.a. sucrose, a.k.a. saccharose)
A grain of sugar weighs approximately 0.000625 grams. Sugar consumption varies widely by country; the average citizen of the United States consumes about 61,200 grams of sugar each year.