This is my 1st attempt, I have no documentation on this subject, just a photo of a film on Youtube
What do you think about it?
I think he is too large and the mouth is too big



If you have advices, I'm taker

Magicseb,
Faces are all about what you what the character to portray.  To me, the one you have chosen to do is sorta cartoony in that it suggests a goofy, happy-go-lucky attitude.  When I looked at what you had created, what came to mind was that the face wasn't quite completed, not that the smile was too big.  By the way, I would have been very proud if my first attempt at making balloon faces was as good as yours is.

What I did in these photos was try and match all the bubble sizes and colors you used (same big smile) with a few minor alterations.  The first thing I did was to replace the white pinch twist above the eye with an orange one.  The second, I didn't attach the neck to the back of the head pinch twist.  I just ran the balloon down the center.  Then the third thing I did was add more hair.  Once all the hair was added, it rounded out the face and that made the smile look smaller, even though it isn't.

After I had the face made, it occurred to me that it needed a tongue so I added one.  

If you had intended the head to go on a 260 body, then yes, it's too large.  However, if you used a 350/360 body, it would be just about the right size.

Happy twisting,
Bonnie, The Balloon Lady

Thank you Bonnie for all your advices, I will work it as soon as possible