14 characters long
The JavaScript meter originated from Microsoft is demonstrated on PasswordsDay.org page. Its merely requires that good passwords should be at least 14-characters long. Perfect passwords should confirm to more rules, but for testing I've used definition for "good" password only.
Passwords from tops of Rockyou leak allowed by policy:
558 manchesterunited
513 mychemicalromance
476 123456789123456
370 friendsforever
267 prettyprincess
251 highschoolmusical
250 111111111111111
239 123456789012345
232 iloveyousomuch
226 siempreteamare