Please run the attached sample project. The row's height in the print document is not adjusted according to the column's width in the print page. 

Workaround: 

Usually for such cases it is convenient to increase the column's width in order to reduce its height and thus it would be able to fit the print page's height. In addition to adjusting the column's width, feel free to use multi-page printing:

https://docs.telerik.com/devtools/winforms/controls/gridview/printing-support/gridprintstyle#multi-page-printing