This is the 17476th most frequent Russian word.
толщиной
"Толщиной" means "with a thickness of" or "thick."
Here, 'толщиной' refers to the thickness of an object, specifically a physical wall, denoting its measurement in meters.
Стена была толщиной целый метр.
The wall was one meter thick.
In this context, 'толщиной' describes the thinness or thickness of a sheet of ice, highlighting its measurement in centimeters.
Лед на озере оказался толщиной всего несколько сантиметров.
The ice on the lake turned out to be only a few centimeters thick.
Here, 'толщиной' is metaphorically used to describe the thickness as related to the number of pages within a book.