The flag of the Netherlands consists of three horizontal stripes of equal size. The colors and their respective hex color codes are as follows:

1. Top stripe: Red (#AE1C28)
2. Middle stripe: White (#FFFFFF)
3. Bottom stripe: Blue (#21468B)

The flag has an aspect ratio of 2:3, meaning its width is two-thirds of its length. There are no other specific geometric properties, measurements, or symbols on the flag.