Question about Apple Smart Folio

The dimensions are exactly the same:

https://support.apple.com/kb...

https://support.apple.com/kb...

178.5 x 247.6 x 5.9 mm on the first link,
178.5 x 247.6 x 5.9 mm on the second link.

However, the weight is different, with the 11 inch 3rd gen weighing