About size: length * width

5*7 inch is 13cm*18cm
6*8 inch is 15cm*20cm
6*9 inch is 15cm*23cm
7*9 inch is 18cm *23cm
7*10 inch is 18cm *25cm
8*10 inch is 20cm*25cm
9*11 inch is 23cm*28cm

Note: If you don't know how to convert the size, please contact us.

About density:

We have 120% and 130% densities.
If you need to be thicker, please choose 130%.
If you need medium to high density, 120% is the best choice.