Paper size impossible to encounter ISO standard papers in day-to-day uses, with "Carta" (Letter), "Oficio" (Government-Legal) and "Doble carta" (Ledger/Tabloid) being nearly universal. In Canada, US paper sizes are a de facto standard. The government, however, also uses ISO paper sizes. There is an additional paper size, , to which the name "Government-Letter" was given by the IEEE Printer Working Group (PWG). It was prescribed by Herbert Hoover when he was Secretary of Commerce to be used for US government forms, apparently to enable discounts from the purchase of paper for schools, but more likely due to the standard use of trimming
Ledger stone ledger slabs. These occur in the East Midland counties of Leicestershire, Derbyshire and Nottinghamshire, with four outlying examples in Lincolnshire. Examples date mainly from the 14th and 15th centuries, with incised figures. An exceptional example of an alabaster ledger slab is that of Richard and Isabel Tresham in Geddington Church in Northamptonshire dated 1433. The sword in the slab is inlaid with a blueish-greenish stone as is also Isabel's headdress. Richard is shown with a dog beneath his feet and below the couple are their six children, five daughters and a son. Swithland slate was widely used for ledger and