I wasn't sure..
If so, yes. I have been with two gentlemen (not as a provider) who were so huge it was ridiculous. I wanted to jokingly say (no, I didn't), maybe you should just stand there, and let me pitch a ball to you - because that bat isn't going to fit in me, no way! Instead, we proceeded and it was not pleasant - but also I don't think it was good chemistry anyway. So, while big is nice, it doesn't immediately mean that bigger is BETTER, because there is such a thing as too big - it flat out can hurt!

I have also been with one gentleman (no, not as a provider) who was so small, I honestly didn't know he was in YET, and he had just finished! Not one of the best moments..

I guess what I dislike about questions like this is that no matter what the answer, it doesn't alter the facts. Things are what they are, so who cares?

I have been told by a couple of providers that they wouldn't try greek with me, and had one provider who wouldn't even do plain old FS.  I am not enormous.  Just what I imagine is a little bigger than average.

It obviously depends on the girl.  For some, no size is too big, and for some, even a little big is too much.

This is a funny question.
Several providers have told me that he is the biggest they have ever seen.  I took the comment as a compliment that they were trying to make me feel good.  I only had a problem once in Singapore.  He does change size based upon several conditions.  I have not had any problems in other countries.  

...excuse me for posting under another alias but being 'endowed' but not ridiculously so, I have found that it translates into much more foreplay...a woman can accomadate a 'large one' but only if sufficiently excited and relaxed.  No slam bang thankyou maam for me unless she is already quite large (which is rare and anyhow less fun).