I am sure that there is something wrong with Layout Details settings.
Pleasem see the image bellow.
In left side is the setting in layout and right side the result. Is not proporsional as the values
Which is the unit value apply in Layout Details fields? DIP also, like card settings
Yes, the value is dip. The grid preview currently doesn't scale the values to maintain proportions - we are improving it for the next update to provide a much better approximation. (However, since you don't know what your end target device screen is (e.g. could be a phone) , it will still be a best approximation and won't replace the accuracy of on-device preview).