The statue's height should be at least at eye level. It is always a matter of respect to approach the idol from below rather than from above. This is true for every religious or spiritually significant picture or statue. If you are not sure about the height you should leave it to a professional. Measure the wall where the statue will be placed and take into account the fact that people tend to look up as they walk by. You should also take into account how high you expect visitors to be able to see the statue clearly. In general, a smiling figure between 1.5 and 2 meters (4 and 6 feet) high would be appropriate. However, if you have limited space, you may want to opt for a smaller version of this image. Here are some examples of famous laughing Buddha statues: Hanging Rock, Victoria; The Laughing Buddha, San Francisco. Both of these statues are well worth seeing in person!