My calipers say 153.1 x 75.2 x 15.5 (thickness measured only once, I don’t like hard metal calipers against the screen).
But if you measure width including kill switches and volume/power buttons, then it comes out at 76.6 or some such. (springy buttons introduce bigger measurement error)
While I’m at it; battery dimensions are 10.5 thick, 60 across the phone and 57 mm along the phone, and I could fit six AAA’s into battery compartment and they rattled in all three dimensions. 