Edit: I totally didn’t see that the original post was from 2011
Like the others mentioned, it really isn’t a miniature. They actually can get to be quite beefy. I have a near blooming size one that is mounted on a tree fern plaque and doing well, but it is more dependent on your conditions than anything else. I have lots of rain and super high humidity (and a lot of heat which these seem to like...) most of the year. it will get heavily watered once or twice a day in the summer and once a day, sometimes every other day, in the winter. So it just depends if you can keep up with the watering needs easily
Here’s a video of a nice one for Orchids Ltd. for a size reference. If you are looking for a mini, do you have a Phal. equestris?