The flag of Saint Martin consists of two horizontal bands of equal width, with the top band colored white and the bottom band colored blue. The aspect ratio of the flag is 2:3, meaning that its length is 1.5 times its width. The geometric properties and measurements of the flag are not specified in any official documentation, but it is typically seen in a size ratio of 3:5 or 2:3. The specific shades of white and blue used in the flag may vary slightly depending on the manufacturer, but the Pantone color codes for the flag are PMS White and PMS 293C, respectively.