5 ounces
An official soft baseball (or practice ball) still conforms to the official size and weight of the official hard baseball, but it has a synthetic leather cover with a sponge cork and rubber center. These are usually Official T-Ball practice balls. Higher league practice balls still maintain the official size and weight, but contain a full-grain leather cover with a wound cork and rubber center.
Weight of a baseball According to the rules of Baseball, "It shall weigh not less than five nor more than 5 1/4 ounces avoirdupois"
In 1929, a standard baseball weighed between 5 and 5.25 ounces (approximately 142 to 149 grams). This weight has remained consistent throughout most of baseball's history, as the official regulations set by Major League Baseball have maintained these specifications. The size and weight of the baseball have been critical for ensuring uniformity in the game.
Weight of a Major League Baseball According to the rule book, a baseball must weigh at least 5 ounces and can not exceed 5.25 ounces. Official balls must weigh between 5 and 5 1/4 ounces.
There is no official weight for middle school, it depends on area.
Official softball weight is 6.8 oz
The weight of a single baseball would be measured in grams (g).
An official baseball is 5 oz. and an Official Softball is 6.8oz.
The official Baseball used in the Major Leagues up to 1976 was A Spalding
no.
52 kilos
On the Rawlings website, you can buy a "Rawlings ROLB Official League Baseball." Thus ROLB = Rawlings Official League Baseball