What size are speakers in the 1990 Nissan 300zx?

1984-1989 2 Door

6.5 F. Door

6.5 R. Side

1990-1996 2 Door

6.5 F. Door

5.25 R. Side (with Bose system 3.89 inches [odd size])

Ref - http://forums.nicoclub.com/zerothread/12043