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The MacBook Air 15" (M3) and MacBook Pro 14" (M5) are most easily told apart by their overall size. On height, the MacBook Air 15" (M3) measures 237.6 mm against the MacBook Pro 14" (M5)'s 221.2 mm — about 16.4 mm more. On width, the MacBook Air 15" (M3) measures 340.4 mm against the MacBook Pro 14" (M5)'s 312.6 mm — about 27.8 mm more. On thickness, the MacBook Pro 14" (M5) measures 15.5 mm against the MacBook Air 15" (M3)'s 11.5 mm — about 4.0 mm more.
The MacBook Pro 14" (M5) is the heavier of the two at 1.55 kg, compared with 1.26 kg for the MacBook Air 15" (M3). That is a 295 g difference (23%). In daily handling the difference is easy to feel.
| Metric | MacBook Air 15" (M3) | MacBook Pro 14" (M5) | Diff |
|---|---|---|---|
| Width | 340.4 mm | 312.6 mm | +27.8 mm |
| Height | 237.6 mm | 221.2 mm | +16.4 mm |
| Depth | 11.5 mm | 15.5 mm | -4.0 mm |
| Weight | 1.26 kg | 1.55 kg | -295.0 mm |