The length (height) of the iPhone Pro Max models varies slightly by generation:

• The iPhone 15 Pro Max (17th Gen) measures 6.29 inches (159.9 mm) in height

• The iPhone 14 Pro Max has a height of 6.33 inches (160.7 mm)

• The iPhone 13 Pro Max (15th Gen) is 6.33 inches (160.8 mm) tall

So, the current iPhone Pro Max models are approximately 6.3 to 6.33 inches long.