How to make 3d text values larger in 3d view? How do i make these values larger ?
The font size for the dimensions is the same size as the text in panels throughout Blender (ie, the fields in the right-hand properties panel in your screenshot. You can adjust the overall font size by adjusting the DPI setting in the System section of the User Preferences :



Note that adjusting the DPI will affect the whole Blender user interface, not just the labels in the 3d View.