By the time you receive the diagnosis for the condition of hydrocephalus, it is likely that you or your child have already been through a gamut of tests. This first of a three-part series describes the process of being diagnosed with hydrocephalus.
The ISO 216 standard defines A5 size to be 148mm Ã 210mm, which is also exactly half the size of an A4. Usually A5 sized paper will be used for booklet printing, flyers, leaflets, advertisements, or if on heavier stock, it can be scored and folded to make A6 sized greeting cards. 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. This aspect ratio is especially convenient for a paper size.
If you use an A6 paper, which is actually an A4 paper that is folded twice, then the matching envelope format should be a C6 envelope. A C6 paper format should be matched with a B6 size envelope (125 mm x 176 mm) while a C5 paper should be matched with a B5 size envelope (176 mm x 250 mm). A C4 size paper should be matched with a B4 format envelope (250 mm x 353 mm). Finally, a B4 size paper should be matched with an E3 size envelope (280 mm x 400 mm). There is a different standard that is in use in North America. However, it should be noted that not all envelope sizes are used for sending mail.