For a truly business experience, here is a mockup template featuring two cards in special angles with super realistic shadows. Since you have two cards under your full control, you can easily use one for showcasing the amazing front design and the second for the backside.
When you’re working with a client, this is an excellent way of providing them a photo-realistic presentation of how the final project would look like. At this moment, you can still perform different changes until you are fully satisfied with your creation. Save yourself a ton of time and money on making a presentation and let the printing begin.