
It's about oneandonetenth times as heavy as a Deck of Cards.
In other words, the weight of a Deck of Cards is 0.91 times 28.6 monme (匁).
(ISO 216 B8 size, a.k.a. "poker size" 63 x 88 mm, 52card deck)
It's about fourfifths as heavy as a Battery (D).
In other words, 28.6 monme (匁) is 0.794 times the weight of a Battery (D), and the weight of a Battery (D) is 1.26 times that amount.
(Alkaline)A "D" size battery weighs 36 monme (匁). The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about threefourths as heavy as a Baseball.
In other words, 28.6 monme (匁) is 0.73817217933512 times the weight of a Baseball, and the weight of a Baseball is 1.3546974919872 times that amount.
(MLB rules)
It's about twothirds as heavy as a Puck (Hockey).
In other words, 28.6 monme (匁) is 0.65793607288565 times the weight of a Puck (Hockey), and the weight of a Puck (Hockey) is 1.5199045032051 times that amount.
(Ice hockey)
It's about twothirds as heavy as a Billiard Ball.
In other words, 28.6 monme (匁) is 0.65793607288565 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 1.5199045032051 times that amount.
(Americanstyle, WPA specifications)Per the World PoolBilliard Association, a billiard ball weight must weigh between 41.579300583333 monme (匁) and 45.359237 monme (匁). According to legend, the difficulty in obtaining elephant ivory for the manufacture of billiard balls in the 19th century inspired the search for a replacement material, which led to the development of the first industrial plastic.
It's about oneandseventenths times as heavy as a Battery (C).
In other words, the weight of a Battery (C) is 0.59 times 28.6 monme (匁).
(Alkaline)
It's about oneandninetenths times as heavy as a Tennis Ball.
In other words, 28.6 monme (匁) is 1.86 times the weight of a Tennis Ball, and the weight of a Tennis Ball is 0.538 times that amount.
(ITF Standard; for Type 2 ball) 
