PREVENT BIRD STRIKES - Prevent beautiful real from into your windows with these 4 decorative Hummingbird anti collision window clings. INSIDE AND OUT - Each individual is double sided using innovative print process so decorate both the from inside and outside of your windows. UNIQUE - Each is completely unique and slightly translucent so as to catch the . They are all sized approximately 16cm x 10cm. NO MESS - Static 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 and be re-used muliple . Convenient and reusable: step 1, clean the window with a duster, , spray a mist of water on the glass, step 3, the hummingbird window from the vinyl backing and place it on the window in any you like; If you to rearrange it, simply 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.