You can hit the S key and scale the newly imported curve with your mouse. I find it easier, particularly with the small-sized SVG files, to type in a new Scale in the Properties Shelf. The steps are:
- By default, newly imported SVG files should be already selected. If not, make sure you are in Object Mode and in the Outliner window, you can left-click the object to select it even if you can't see it in the 3D View window:
Clicking objects in the Outliner will select them
- In the Properties Shelf, under Transform, change the Scale for X, Y, and Z to equally large numbers. I type in