The post are 14in. tall and are 1/2 in. in diameter. They are designed to accommodate different heights of cord or wire. We recommend using one of the top and bottom holes to create those levels. Both the cord and wire are easily pulled through the holes. High winds and temperatures do not affect the posts. The post tip adds an extra repellent featue, but if safety is a concern, the Safety Posts, featuring a yellow cap, should be used.