As you are not using units for 8x11 I guess that's inches, which is a funny unit, considering this thread started about German meaning of "Taschenbuch" 8cm x 1

As you are not using units for 8x11 I guess that's inches, which is a funny unit, considering this thread started about German meaning of "Taschenbuch" 8cm x 11cm = 3.14in x 4.33in 8in x 11in = 20cm x 28cm