The AKC Breed Standard for Papillons calls for a heights between 8 -11 inches.
That is in this little breed quite a difference.
Her is a sample of Quarter Man, my biggest Papillon @ 10+1/2 inches, (29 cm) (the red/white Papi),
and the second of my smallest Papillons, the 8 Months old Stenley @ 9+1/2 inches,(24 cm) (.(black/white) At 8 Months, Stenley is full grown.