Handle Styles
Using the resize Handle Style tool found at the top of the Properties Panel will display an arrow above the object that can be selected.
Click and drag the arrows that appear to resize the object
Using Properties Panel
It is possible to set the X, Y, Z scales of the object to precisely resize the object.
1. Select the object in the Object Menu of the Properties Panel.
2. Enter the X, Y, Z scale values in the appropriate text boxes