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
Hex Sheets and were some of the few licensed "D&D" products ever authorized by TSR. Hex Sheets Hex Sheets is a supplement for fantasy role-playing games published by Games Workshop in 1978. "Hex Sheets" is a GM's aid: hexagonal mapping paper for designing wilderness terrain. It is also for use with "AD&D". "Hex Sheets" was published by Games Workshop in 1978 as a 50-sheet pad. As Games Workshop expanded its publishing arm beyond "White Dwarf" and reprints of American products. among their first original products were a pad of character sheets (1978), a pad of hex sheets (1978), and the "Dungeon Floor