Standard size 90mm x 55mm. Namecardonline.com only provide crappy paper and crappy quality.
My advise : Low price / Sucky job. High Price / Better Quality. Get in between
End of the day is what you want to achieve and what you want to give your client
behyx: I think you can look for Offset printer. There 2 type of offset printer and 2 type of offset printing. If is a 4C look for big printer because they got 4c machine with 1 run. if is only 1c or 2c go for small printer.
offset: the more u print the cheaper it is because there is only 1 operation setup cost.
if you want you can pm me for my printer, I did my arts awards print out there.