Patterns created with straight lines are called geometric. Their designs are created mostly with right angles, diagonals, triangles, and other geometric shapes. Geometric patterns can have either simple or very complex motifs. Usually Persian shawls with geometric patterns are very intricate. Baluchi, Turkoman, Turkish and Caucasian styles are good representations of the geometric pattern.

Geometric patterns are mostly found in Islamic art. Geometric patterns can be used to make one of the three nonfigural types of decoration in shawls, which also include calligraphy and vegetal patterns. Geometric patterns are abstract designs that adorn the shawls and garments. Consisting of and generated from simple forms like circle, square, etc, geometric patterns were combined, interlaced, duplicated and arranged in intricate combinations to produce excellent designs.

Geometric patterns are mainly constructed from four basic shapes also called repeat units. From these shapes, the more complicated patterns like circles and interlaced circles; squares or four-sided polygons; the ubiquitous star pattern, ultimately derived from squares and triangles inscribed in a circle; and multisided polygons; are constructed.