The flag of Guatemala has an aspect ratio of 5:8. It consists of three vertical stripes with equal width. The two outer stripes are sky blue (#4997D0) and the middle stripe is white (#FFFFFF). Centered on the white stripe, there's a Guatemalan coat of arms which features a wreath, crossed rifles, crossed swords, and a scroll.

The flag's geometric properties include:

1. Three vertical stripes of equal width.
2. Coat of arms centered on the white stripe.

Exact measurements for the coat of arms aren't standardized, but it is generally scaled proportionally to fit within the white stripe.