Grammage are the same weight paper having different cut size. However, a sheet of common copy paper that has a basis weight of does not have the same mass as the same size sheet of coarse paper (newsprint). In the former case, the standard ream is 500 sheets of paper, and in the latter, 500 sheets of paper. Here are some basic ream sizes for various types of paper. Units are inches except where noted. Sheets can be cut into four sheets, a standard for business stationery known conventionally as "letter sized paper". So, the ream became commonly used. The book-paper
Ream National Park Ream National Park Ream National Park ( - "Outtyeancheat Ream"), its official name is Preah Sihanouk Ream National Park ( - "Outtyeancheat Preah Sihanouk Ream"), is a national park of Cambodia located from Sihanoukville city in the Prey Nob district of the Sihanoukville Province in south-eastern Cambodia. It was established in 1993, as the Cambodian government began to take action for the protection of the country's threatened natural resources. The national park's biological value is defined by its combination of rivers, forests, mangroves, estuaries, beaches, coral reefs, wildlife, and marine life. Ream National Park constitutes the south-east of Prey Nob