In some countries, such as the U.S.A., there are quite a lot of major planetariums and an enormous number of small fixed-operating planetariums. In France, the situation is not as good. There are only three planetariums with domes in excess of 15 meters across, six with diameters between six and nine meters, and ten transportable ones. For these last — five EX3s, three Starlabs and two of personal design — the inflatable domes are between four and five meters in diameter, providing a dedicated astronomy teaching facility significantly large to accommodate a typical class.