The ISO 217:2013 standard defines the RA and SRA paper formats.
These paper series are untrimmed raw paper. RA stands for “raw format A” and SRA stands for “supplementary raw format A”. The RA and SRA formats are slightly larger than the corresponding A series formats. This allows bleed (ink to the edge) on printed material that will be later cut down to size. These paper sheets will after printing and binding be cut to match the A format.
|RA||Series formats||SRA||Series formats|
|RA0||860 × 1220||SRA0||900 × 1280|
|RA1||610 × 860||SRA1||640 × 900|
|RA2||430 × 610||SRA2||450 × 640|
|RA3||305 × 430||SRA3||320 × 450|
|RA4||215 × 305||SRA4||225 × 320|
Paper in the RA and SRA series format is intended to have a aspect ratio but the dimensions of the start format have been rounded to whole centimetres.
For example, the RA0 format has been rounded to 860 mm × 1220 mm from the theoretical dimensions .
The resulting real ratios are:
The sizes of the RA series are also slightly larger than corresponding inch-based US sizes specified in ANSI/ASME Y14.1, e.g. RA4 is roughly equivalent to 8½ in × 12 in and ANSI A (alias US Letter) is defined as 8½ in × 11 in.
ISO 216 specifies international standard (ISO) paper sizes used in most countries in the world today, although not in Canada, the United States, Mexico, Colombia, or the Dominican Republic. The standard defines the "A" and "B" series of paper sizes, including A4, the most commonly available paper size worldwide. Two supplementary standards, ISO 217 and ISO 269, define related paper sizes; the ISO 269 "C" series is commonly listed alongside the A and B sizes.
All ISO 216, ISO 217 and ISO 269 paper sizes (except some envelopes) have the same aspect ratio, √2:1, within rounding to millimetres. This ratio has the unique property that when cut or folded in half widthways, the halves also have the same aspect ratio. Each ISO paper size is one half of the area of the next larger size in the same series.List of International Organization for Standardization standards, 1-4999
This is a list of published International Organization for Standardization (ISO) standards and other deliverables. For a complete and up-to-date list of all the ISO standards, see the ISO catalogue.The standards are protected by copyright and most of them must be purchased. However, about 300 of the standards produced by ISO and IEC's Joint Technical Committee 1 (JTC1) have been made freely and publicly available.List of stationery topics
This is a list of stationery topics. Stationery has historically pertained to a wide gamut of materials: paper and office supplies, writing implements, greeting cards, glue, pencil cases and other similar items.Paper size
Many paper size standards conventions have existed at different times and in different countries. Today, the A and B series of ISO 216, which includes the commonly used A4 size, are the international standard used by almost every country. However, in many countries in the Americas as well as in the Philippines, the North American series of paper sizes such as 'Letter' and 'Legal' is more prevalent.Paper sizes affect writing paper, stationery, cards, and some printed documents. The international standard for envelopes is the C series of ISO 269RA3
RA3 may refer to:
Command & Conquer: Red Alert 3, a real-time strategy video game
Rocket Arena 3, an unofficial game modification for first-person shooter Quake III: Arena
RA3, an ISO 217 standard paper size
RA3, a file extension for RA3DIO Terrain Information softwareSRA
SRA may refer to:
The National Center for Biotechnology Information's Sequence Read Archive (previously Short Read Archive)
SRA, a type of semiregular variable star
Satanic ritual abuse
Senior Airman (SrA) in the US Air Force
SRA0 to SRA4 are ISO 217 standard paper sizes
Surveillance radar approach in aviation.
SRA-shooting, Sovellettu reserviläisammunta, Finnish practical shooting sports
Superhuman Registration Act fictitious law in Marvel Comics
Serotonin releasing agent
Stratford station, London, UK, station code
ISO standards by standard number