Select the row or rows you want to resize
Move the pointer to the bottom border of the row header until it becomes a double-headed arrow
Drag the border up or down to change the row height
Double-click the bottom border to auto-fit the row height to the contents
Right-click the selected row header and choose Row Height
Enter the desired height and click OK
On the Home tab, go to Format in the Cells group
Select Row Height
Enter the desired height and click OK
To change multiple rows at once, select all the rows first and then resize any selected row
To apply the same height to all rows, select the entire sheet and set the row height