If you are a beginning skate boarder, begin with a small nasty slam. Not only the length, but also the position is important. It won't be too extreme for you to deal with, but you will still be able to practice your techniques on your own, without viewing a skateboarding recreation area. The best of this nasty security are created of durable, nasty. Create sure that they seem able to hold up against the elements as well as any misuse from your skate board.
Slimmer nasty security may even extend under the bodyweight of you and your skate board. Once you have perfected this small slam, then you can move up to a bigger and higher slam. You can always use skateboard ramps along with your bigger slam for making a small skateboarding recreation area once you have outgrown it. More experienced skaters can begin with a large, extreme slam, or even a small one fourth tube or half tube.
These are more expensive, and more risky because of their higher hills, but they are also complicated enough for any stage of skate boarder. Choose one of these after you have already perfected the smaller nasty security. These are usually created of wood, and will not extend under the body weight of your skate board. Besides the conventional slam design, and then there are low tracks, smash bins, and other types often found in skateboarding recreational areas.