For my freelance design and engineering work I've been using this business card, with contact information on the front and a list of services I offer on the back. The font is Gotham Rounded, which I've also been using for some CNC-routed signmaking recently as the inner radii of the letters in this font are ideal for that purpose.

These were printed by the UK firm Moo on 16 pt paper with a matte finish and rounded corners. Dimensions of 85 x 55 mm (Moo now calls this the “Moo size”) are standard in the UK and some of Europe.