pinstripes

Pin stripes are a pattern of very thin stripes running in parallel found in cloth. The pin-striped suit has become associated with conservative business attire, although many designers now produce fashionable pin-stripe patterns for fashion-conscious consumers. Fine lines for vehicles are also called pin stripes.
Although found mostly in men's suits, any type of fabric can be pin-striped. The Chicago Cubs' baseball uniforms have had pin stripes since 1907 and they are recognized as the first Major League Baseball team to incorporate pin striping into a baseball uniform.^[1] Many other Major League Baseball teams — including the Minnesota Twins, Montreal Expos, New York Yankees, and Philadelphia Phillies — later adopted pin stripes on their own uniforms. This was later carried over into the NBA, with teams like the Charlotte Hornets and Orlando Magic incorporating pin stripes into their uniforms.

One observation I've made is that the stripes are almost always vertical stripes, this is how I think most people would associate pinstripes to be. I actually really like the baseball clothes with the thin black stripes on white but I'd have to consider my target market for this.

Some more white with black stripes, I'm not sure if these take way the 'businessmen' sophisticated style that I'm going to be aiming for.