Check out these awesome labels from Cherry Hill Designs!  I can think of a million uses for them!

These extra-large 4”x2” adhesive labels can be used in place of calling cards or gift tags. Stick them on birthday gifts, handmade gifts, school supplies, envelopes -- you name it!  They're made of waterproof polyester, so despite the great price, they are also very durable for long-term applications.