Due to our high page rank in google. I would guess that 123Decal.com has a good portion of the market share for Static Cling Decals. Which is really cool if you think about it. We originally centered our business model around Custom Decals, Vinyl Decals. But Since google controls us we have really catered to the Static Cling Decal Market along with Double Side Decals.
Static Cling Decal are unique in the fact that they are removable and re-usable decals plus they can be placed on the inside and the outside of your car. 90% of our Orders are for Face Adhesive Decals. Which is a Decal that is in the Window on the inside but viewable to the outside viewer. We have a lot of content that explains in more fully on our website at: http://www.123decal.com/static-cling-decals.asp