It's also very close to the size the smaller (non-plus etc) Samsung flagship phones have head for years:

S10: 149.9 x 70.4 x 7.8 mm

S20: 151.7 x 69.1 x 7.9 mm

S21: 151.7 x 71.2 x 7.9 mm

S22: 146 x 70.6 x 7.6 mm