Comfortably holds three credit cards, licence, a few bills, and perhaps some thinner cards to boot.  Don't cram, as if you do, it defeats the purpose of this item and you might as well carry around a regular wallet.  Seller's shipping time was the fastest I've experienced in my history of Internet shopping.  A recommended little item.

EDIT:

Two months into the purchase and I am still pleased.  Haven't noticed anything odd, such as the magnet weakening or anything.  Still recommended.

EDIT 2:

16 months later.  Still going strong.  Magnet not weak and no problems to report.  A highly recommended little item at this point.