growth of a guinea pig

Question
my wife and i just baught a guinea pig and so far its doing great, i built a play pen for it and saved some money on it but my wife is trying to figure out about how large guinea pigs typically grow, we have a short haired guinea pig. would you happen to be able to answer that for me please?. thanx

Answer
Edgar --

On average, a guinea pig grows to be between 9-12" long.  This is, of course, an average -- some are smaller, and some are bigger.  However, if you are concerned about the living space for your animal, just be sure the guinea pig has at least 1 1/2 sq. ft. of space.  That's all you need for one animal.  Of course, the more room the animal has, the more active and happy he will be.

Hope this answers all your questions.  If you have any further questions or need clarification on any issue, please feel free to contact me.  Good luck!

Lorena