The national flag of Bulgaria has a rectangular shape with a 3:5 aspect ratio. It consists of three equal-sized horizontal stripes - white at the top, green in the middle, and red at the bottom. The colors are defined using specific Pantone color codes, which are: white (#FFFFFF), green (#00966E), and red (#D62612). The geometric properties of the Bulgarian flag are that the width is equal to 1.67 times its height, and the three stripes have a width-to-height ratio of 9:13.