Of all the dress shirt patterns, checkered dress shirts have the most combinations. Checkered shirts are considered more casual style attire, although gingham has become a very popular choice for both office and casual wear. For checkered shirts, the fabric is woven to create a checkered effect by overlapping solid colored thick stripes over another. Checks can also be two-toned. Plaid is a checkered pattern that, depending n the color and thickness of the checks, can be found on dress or casual shirts.