Apple iPhone Air stands out as the slimmest and lightest in the iPhone 17 series, combining premium design, solid performance, and portability. Slimmest iPhone Yet – At only 5.6 mm thin and 165 grams light, the iPhone Air is the most portable iPhone in the iPhone 17 lineup. – At only 5.6 mm thin and 165 grams light, the iPhone Air is the most portable iPhone in the iPhone 17 lineup. American tech giant Apple has officially unveiled the iPhone 17 series, and one of the most talked-about models is the Apple iPhone Air. Design and BuildThe iPhone Air truly lives up to its name, being the slimmest and lightest iPhone in the iPhone 17 series.