By default, the grid computes row heights based on the font size and a default cell padding which is set to three pixels in the 'wijmo.css' file.
You can change this default easily by specifying a different padding for the cells using CSS. This is a good approach because it applies to cells in all grid panels and does not require any code.
For example, the first grid below uses the default styles. The second increases cell padding to eight pixels, which makes it easier to use on devices with small screens: