Direct comparison of 12promax v 14promax here:
https://versus.com/en/apple-iphone-12-pr...14-pro-max
Under SPECS, scroll down to Design to see physical dimensions in cgs units (centimeter,grams,seconds):
(I used the Terminal 'units' command to convert values)
(~25.4 mm to the inch, ~28.4 gm to the oz)
1. Weight
228g == 8.0424633 oz (Apple iPhone 12 Pro Max)
240g == 8.4657509 oz (Apple iPhone 14 Pro Max)
14 P M is just under 1/2 oz heavier (actual diff is 0.42328754 oz)
2. Thickness
7.40mm == 0.29133858 in (Apple iPhone 12 Pro Max)
7.85mm == 0.30905512 in (Apple iPhone 14 Pro Max)
14 P M is 0.018 in thicker (18 mils) (actual diff is 0.01771654 in)
3. Width
78.1mm == 3.0748031 in (Apple iPhone 12 Pro Max)
77.6mm == 3.0551181 in (Apple iPhone 14 Pro Max)
14 P M is 0.02 in narrower (20 mils). (actual diff is 0.0196850 in)
4. Height
160.8mm == 6.3307087 in (Apple iPhone 12 Pro Max)
160.7mm == 6.3267717 in (Apple iPhone 14 Pro Max)
14 P M is 0.004 in shorter (4 mils) (actual diff is .0039370 in)
and lots of other specs as well.