dimens.xml in values folder for 7“ and 10” tablet, how to?

[krevedko]

I have tried with:values-mpdi, values-land-mpdi, values-hpdi and values-land-hdpiwhich works fine in phone's screens, the problem is that it could happen that a 7" tablet takes the value from values-mdpi and a 10" tablet too, but the result is not the same, I guess because of the screen size (although is the same resolution and similar density)so I tried:values-sw600dp-hdpivalues-sw600dp-port-hdpivalues-sw600dp-mdpivalues-sw600dp-port-mdpivalues-sw720dp-hdpivalues-sw720dp-port-hdpivalues-sw720dp-mdpivalues-sw720dp-port-mdpibut the app crashes because it does not find the resource needed....any help will be much appreciatedthanks in advance