There are number of décor ideas that you can come up with using mirrors. Decorative mirror balls are just one of those ideas. There are some orthodox people that restrict the use of these items to certain places and occasions only. They can however be incorporated into the normal furnishings of your home and blend in quite well.
Decorative mirror balls are widely used in disco clubs, bars and other such outlets. These are normally the large ones with small squares carved right around it. There are however a whole range of smaller sized ones that you can find.
For those that love having parties they can consider purchasing a set of these. They create the same visual effects as in the disco but are much smaller and cheaper. You can check out alibaba.com to see some of the options you have.
They also come with LED lighting to provide the right visual effects. Even as normal decorating items these decorative mirror balls can still work. The smaller sized ones can be placed in different places and on some stands or brackets to give the perfect look. The other use for these balls is of course for Christmas trees. In fact this is one of their most common uses, coming in a variety of colors. You can go to shopwildthings.com and you will see even more of these items.
Another use that they have found over the years is in gardens. These Decorative mirror balls when placed in the garden never fail to make the place look even more beautiful. This is fast becoming one of their preferred uses. So this is just a brief summary of what you can do with these items. Another place where you can possibly get these items is kaboodle.com. From one of these places you should be able to find the item that you are looking for.