People have asked what is the difference between "gingham" and "plaid." Gingham originally came from a Malaysian/French word meaning "stripes." Later, it came to mean a cloth made of cotton that has been dyed before weaving instead of being printed with color patterns afterward or dyed after it's taken off the loom whether or not it has stripes
"Plaid" is derived from a Gaelic word meaning "sheep skin," which is logical, as the early fabrics in the region where the plaid was first found (Scottish Highlands) were wool. The word "tartan" is applied to numerous textile patterns consisting of stripes of varying widths and colors, crossed at right angles against a solid background - each forming a distinctive design. It is these patterns that have been adopted by individual Highland families as their own - and now, even different countries and states in the U.S.A. have their own tartans.
In this era, "plaid" is the name applied to the tartan patterns, so gingham is actually a woven plaid - a very simple form. The Rob Roy family tartan is a "giant" gingham check, as it is composed of two colors only, red and black, in large stripes of equal widths. In my mind, the term "gingham checks" means those pretty fabrics we used to wear ourselves as children - and I delighted in sewing dresses for my daughters with "baby gingham." The fabric was, again, just one color plus white, with a lighter shade of the color where it crossed white in the weave.
Anyway, on Freebies in a little while, I'll do a post on setting up this simple plaid, as it's a foundation for doing more elaborate plaids (tartans, to be correct), and you can see how very easy it is to do. Remember that there is more to creating plaids than just "setting them up." When using them for individual projects, the size and scale must be considered - one wouldn't want to make a large pillow border with tiny little checks!! Also, you can see how easy it is to just widen or make narrower a stripe, add another color or two, and create your own original pattern!!
ADDENDUM: I do have a book on this, available on my web page, Elegant Whimsies - and very soon to be an e-book you can download for yourself.