By extension of the American standards, the halved Letter size, , meets the needs of many applications. It is variably known as Statement, Stationery, Memo, Half Letter, Half A (from ANSI sizes) or simply Half Size, and as Invoice by printer manufacturers. Like the similar-sized ISO A5, it is used for everything from personal letter writing to official aeronautical maps. Organizers, notepads, and diaries also often use this size of paper; thus 3-ring binders are also available in this size. Booklets of this size are created using word processing tools with landscape printing in two columns on letter paper which are then cut or folded into the final size.
By extension of the American standards the halved Letter size  meets the needs of many applications It is variably known as Statement Stationery Memo Half Letter Half A (from ANSI sizes) or simply Half Size and as Invoice by printer manufacturers Like the similar-sized ISO A5 it is used for everything from personal letter writing to official aeronautical maps Organizers notepads and diaries also often use this size of paper; thus 3-ring binders are also available in this size Booklets of this size are created using word processing tools with landscape printing in two columns on letter paper which are then cut or folded into the final size