PREVENT BIRD STRIKES - Prevent beautiful real birds from flying into your windows with these 4 decorative Hummingbird anti collision window clings. INSIDE AND OUT - Each individual design is printed double sided using our innovative print process so decorate both the view from inside and outside of your windows. UNIQUE - Each design is completely unique and printed slightly translucent so as to catch the sun. They are all sized approximately 16cm x 10cm. NO MESS - Static cling means no adhesive, just a fine spray of water to apply which means no lasting damage to your windows and your Hummingbird stickers can be moved easily and be re-used muliple times. Convenient and reusable: step 1, clean the window with a duster, , spray a mist of water on the glass, step 3, peel the hummingbird window cling from the vinyl backing and place it on the window in any design you like; If you want to rearrange it, simply peel it off and move it around. Color: multicolor Material: PVC Package Contents: 2 sheets (4 per sheet) x Hummingbird Anti-collision window clings Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.