A pattern is a recognizable arrangement of elements. What kind of shirt has a pattern

striped shirts, geometrical designer hirts

The answer is explained above.

Explanation:

As stated in the question, a pattern is a repeated decorative design and it is also used as a guide in different types of art and crafts. As a verb, to pattern means to decorate something with a recurring design or to give a regular form to something. Based on these explanation, a shirt with any type of shape can follow a pattern, as long as it has the characteristics explained in this paragraph.