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
Rolling paper Rolling paper Rolling paper is a specialty paper used for making cigarettes (commercially manufactured filter cigarettes and individually made roll-your-own cigarettes). Rolling papers are packs of several cigarette-size sheets, often folded inside a cardboard wrapper. Cigarette paper is made from thin and lightweight "rag fibers" (nonwood plant fibers) such as flax, hemp, sisal, rice straw, and esparto. The paper is available in rolls and rectangular sheets of varying sizes, and has a narrow strip of glue along one long edge. It may be transparent, colored and flavored. It has a high filler content and a basis weight of 10-28 g/m².