trailer buying advice

I'm looking to buy a used horse trailer. We found a 14' stock trailer we really like but we are not sure if it will be big enough. I have a 14.2hh and a 15.3hh horse and the trailers inside height is 6'6". Will this be big enough? I know the width will be just fine I'm just worried about the height. I know years ago a 6' tall trailer was considered large, today it is small but will it still work OK?

Thank You!
SMK

I personally would be scared of anything that wasn't 7 feet tall, especially with your bigger horse. It would be a huge issue if he bumped his head one good time and then didn't want to go back in.

I have a 16ft 4H BP that is 6'6" and my 15.2 h and 15.3 h fit in it easily. I have had no problems. Of course they both haul very well. I have had many different horses in it without a problem.