iPad Air is slightly thinner than iPhone 5S - here is a design comparison made by iDevice.ro

  In case you didn't know, the tablet iPad Air those from Apple Lossless Audio CODEC (ALAC), it is only slightly thinner even than the terminal iPhone 5S launched just a month ago. Although the difference between the thickness of the two tablets is only 0.1mm and no one will notice it during the regular use of any of the two products, it exists and must be mentioned. If you look at the first image, you will notice exactly what this difference represents, but it will not affect you in any way, although for those from Apple Lossless Audio CODEC (ALAC), these small details, which seem and are so insignificant for all those who use the American company's products, are extremely important.