More units here. Tolerances specified in ISO 216 for the C series envelope sizes are the same as for A & B series paper sizes and are as follows: ± 1 1.5 mm (0.06 in) for dimensions up to 150 mm (5.9 in) ± 2 mm (0.08 in) for lengths in the range 150 to 600 mm (5.9 to 23.6 in)
http://www.papersizes.org/c-envelope-sizes.htm
Tolerances specified in ISO 216 for the C series envelope sizes are the same as for A & B series paper sizes and are as follows: ± 1 1.5 mm (0.06 in) for dimensions up to 150 mm (5.9 in) ± 2 2 mm (0.08 in) for lengths in the range 150 to 600 mm (5.9 to 23.6 in) ± 3 mm (0.12 in) for any dimension above 600 mm (23.6 in)
http://www.papersizes.org/c-envelope-sizes.htm
Paper and Envelope Sizes. Paper and envelope sizes need to be correctly matched to each other. The ‘A’ range is the main finished trimmed size of paper used in printing. The series begins with A0 whose area is exactly 1 square metre, and then the ratio of the sides of smaller A sizes are always 1:square root of 2. A8 74x52mm.
http://www.severnprint.co.uk/resources-box/paper-sizes/
What is a DL? DL stands for dimension lengthwise and is a common size for envelopes and promotional materials such as brochures and flyers. The C Series in the ISO 269 standard defines DL size to be 100mm × 210mm, which is also exactly a third the size of an A4. Usually DL size stock will be used for envelopes, brochures, flyers, leaflets, cards and invitations. In the ISO paper size system, the height-to-width ratio of all pages is the square root of two. In other words, the width and the height of a page relate to each other like the side and the diagonal of a square.
http://dlsize.com.au/
Despite complaints from manufacturers of automatic enveloping machines that it is slightly too small for reliable enveloping and the introduction of a C6/5 envelope at 114 x 229 mm, the original DL size continues to be most commonly used.
http://www.papersizes.org/c-envelope-sizes.htm
›› 220mm (width) x 110mm (height) The dimensions of a DL envelope are shown left, along with a diagram helping to explain visually how DL relates to other envelope sizes in the C Series. C Series envelope measurements adhere to ISO 216 standards.
http://papersize.org.uk/paper/envelope-sizes/dl-envelope-size-dimensions/
Envelope Size Guide DL C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10. Deciding which envelope type and size you need before you order can be difficult. Below we have a comprehensive size guide where you can search the dimensions in either mm, cm or inches to help you easily find the envelope that fits your needs. After you’ve decided on the size you require, the type or style that you need has to be decided upon. From side seam to ticket, metal clasp to commercial flap we’ll show you what envelope styles are out there for you to choose from.
http://www.officexpress.co.uk/envelope-size-guide/
C0, the Series‘ largest envelope has a width of 917mm. All smaller envelopes thereafter, C(x) are created by C(x-1) halved parallel to its shorter sides. For example, C5 is half the size of C4, C6 is half the size of C5 etc. All measurements are rounded to the nearest millimeter.
http://papersize.org.uk/paper/envelope-sizes/dl-envelope-size-dimensions/
DL Envelope Size measures: The dimensions of a DL envelope are shown left, along with a diagram helping to explain visually how DL relates to other envelope sizes in the C Series. C Series envelope measurements adhere to ISO 216 standards. The width of each envelope is determined by dividing the height by 1.4142.
http://papersize.org.uk/paper/envelope-sizes/dl-envelope-size-dimensions/
One of the most widely used business envelopes, the DL format does not fall under the C series sizes as it has a different aspect ratio. This envelope originated in Germany in the 1920's and was known as DIN Lang, but DL is now more commonly expanded to 'Dimension Lengthwise'.
http://www.papersizes.org/c-envelope-sizes.htm
what size is a dl envelope
The size of a DL envelope is 100 millimeter by 210 millimeter. The size of a DL envelope is 100 millimeters by 210 millimeters.  