The mini grid is a popular dress shirt pattern featuring thin vertical and horizontal stripes that create a gridded pattern throughout the shirt. From a distance the shirt most often looks like a solid color, but as you get closer up the pattern will become more apparent.
The mini grid is a really popular option for business shirts as they add pattern to a look without appearing overly aggressive. You can generally wear a solid, striped, or patterned tie or suit with mini-grids. Just make sure any sort of pattern is medium-to-large in size, as smaller pattern can look a little busy with a mini grid shirt.