Business cards appear in standard sizes. You can customize the size based on your needs. Here’s how the standard business card size looks like.
Horizontal business card size — 3.5” x 2.0”
Vertical business card size — 2.0” x 3.5”
For square business card the size is 3.5” x 3.5”
Make sure to adjust the important details toward the center to avoid trimming information during the printing.