Many people are tempted to get custom business cards made in a wide range of shapes and materials to help them differentiate themselves from the competition. While on the surface this is a good idea, there are several caveats to keep in mind if you want to pull off what can be quite a complicated proposition.
The problem with most personalized business cards is the fact that they are non-standard, so the people you give them to don't know what to do with them. Consider this, wallets and Rolodexes are designed to accommodate rectangular business cards. If you give someone the finest quality metal business cards like a diamond or even a triangle, they may not know how to store it and end up discarding your contact information instead of keeping it.
So if you want to use a custom shaped business card, you will want to stick to a shape that fits the standard business card rectangle. For example, you can start with a standard rectangle and then cut the corners to create something with more interesting edges, or you can scallop the edges to create a wavy effect.
Choosing custom materials for a business card represents another interesting situation. There is no denying the beauty and sophistication of business cards that are made of wood or metal. They are beautiful to look at and will certainly attract people's attention. However, as with custom shapes, custom materials can present a problem.
They are often thicker than their paper counterparts. This can pose a problem when it comes to storage. Much of this can be mitigated by choosing custom materials that are almost as thin as paper. This is easy enough to do with metal business cards, but more difficult with wooden ones.