Applicable on any paper type
Rectangle is the common used name card shape. In different countries, the standard dimension is different. To list a few: US & Canada – 3.5″ x 2″, Australia – 90mm x 55mm, Japan – 91mm x 55mm, UK – 85mm x 55mm, Malaysia & China – 90mm x 54mm.
Don’t get restricted by the standard dimension, you can have your own preferred size as long as the difference is not too big.