WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
Measure piston skirt diameter.
Standard : 88.980 - 89.010 mm (3.5031 - 3.5043 in)
Fig 1: Checking Outer Diameter of Piston
Courtesy of NISSAN MOTOR CO., U.S.A.
Measure point (distance from the top): 42 mm (1.65 in)