Here is a sundial for Dallas, Texas. It's tilted 32.78 degrees, the latitude of Dallas. The time shown is 12:15, as you can see if you count the vanes from the right, starting at 6:00am. There are light stripes every 5 minutes, and darker ones for 15 and 45 minutes, darker still for 0, 30, and 60 minutes past the hour. In this model, the dial is about 203 feet (62 m) tall. Click on the image to see a movie of the sundial from 08:00 to 13:00 hours, 407KB.