Through-hole footprints: pad size from technical drawings
You may want to have a look at the IPC through hole standards or have a look at this page, where it is a little easier to understand.

In your example:

Minimum Hole Size

Pad is 0.56mm x 0.52mm => sqrt(0.56^2 + 0.52^2) = 0.76mm
Minimum Hole Size = Maximum Lead Diameter + 0.25mm = 0.76mm + 0.25mm 

If you like your components to "stick" you may want to choose Level C (+ 0.15mm)

Pad Diameter

Pad Diameter = Minimum Hole Size + 0.1mm + 0.60mm = 1.01mm+0.1mm+0.6mm = 1.71mm