I run statistical analysis with the files in the average subject of a dataset (created with 5th order icosahedron tesselation).

In order to visualize the results, I open the inflated-surface and the pial-surface with tksurfer and I realize that inflated-surface of the average subject is smaller than the pial-surface. Is it normal? In the fsaverage5 subject these surfaces have a very similar size.

Even, when I load the results as an overlay in the inflated-surface, the results are shown smaller (more than the proportional size) than if I load the results in the pial surface (see attached image).

What can I do to generate an inflated figure with the results in the same size than in the pial surface?

Thank you in advance.
Best regards,
Marina.