An overview of the ISO 216 envelope size format standard, including definition of C series envelope sizes (C3, C4, C5 etc). The purpose of this site is to explain current international standard envelope sizes, covered by the ISO 216 Standard and to provide size charts to allow a quick lookup of sizes. - [more]

Liters to Gallons conversions and Gallons to Liters and converter tables for common conversions. These conversion tables are based offer a quick lookup to convert liters to gallons or you can use our quick convert utility. - [more]