Definition: When folding paper into three parts, c folds have 6 panels (counting both sides of the paper) with two parallel folds in a spiral fold configuration.
The c fold is a common type of fold for tri-fold brochures, letters, self-mailers (such as newsletters), and even other paper products such as paper hand towels.
To allow the panels to nest inside each other properly, the folded in end panel is usually 1/32" to 1/8" narrower than the other panels. This difference in panel sizes, though slight, needs to be taken into account when setting up guides in page layout software and when composing text and images for a brochure or other document. Otherwise, margins will appear uneven or text/images may fall into the folds.
Also Known As: business letter | letterfold | tri-fold | brochure fold | spiral fold
Alternate Spellings: c-fold
