The Bornean orangutan is listed as Endangered and numbers approximately 41,000, while the Sumatran orangutan is considered Critically Endangered with an estimated population of 7,500. A century ago, more than 230,000 orangutans likely roamed in the wild.
Making the world better, one answer at a time. If you go to the United States Postal Service web-stie, you will find that one US First class stamp ($0.42) will cover the cost to mail a letter that weighs up to 1 ounce, about 28.35 grams. Thus, the average weight of a letter is one ounce or less. If you go to the United States Postal Service web-stie, you will find that one US First class stamp ($0.42) will cover the cost to mail a letter that weighs up to 1 ounce, about 28.35 grams.  Minor edit?
The first-class mail parcel option is reserved for items that weigh less than 13 ounces. As of the time of publication, letters cannot weigh more than 3 1/2 ounces. They can be between 3 1/2 inches to 6 1/8 inches high, between 5 inches and 11 1/2 inches long, and as thick as between .007 inches to 1/4 inch.