Pinstripe (noun)

1. A thin, vertical stripe, typically applied to a fabric or surface for decorative purposes.
2. A suit with such stripes, often worn in a formal or business setting.

Origin:

Pinstriping is a form of narrow and thin stripes that are applied to a surface. the word pinstripe comes from the phrase "pin stripe", which refers to the thinness of the stripes.

Examples:

1. The pinstripe on his suit made him look very professional.
2. She wore a pinstripe blouse to the interview.
3. The car had a custom pinstripe paint job.
4. The wallpaper had a subtle pinstripe design.
5. He wore a pinstripe suit to the meeting, to make a good impression.