For my work;
B777-300ER: Legal minimum 10, for service depending on route up to 13.
A330-200: Legal minimum 8, for service depending on route either 9 or 10.
B737-800: Legal (with dispensation approval) and standard minimum 4, for service for flights under 90 minutes 5.
B737-700: Legal and standard minimum 4.
E190: Legal and standard minimum 3.
Hope this all helps!