PREVENT BIRD STRIKES - Prevent beautiful real birds from flying into your windows with these 4 decorative hummingbird anti-collision window decals. INSIDE AND OUT - Each individual design is printed double-sided with our innovative printing process so decorate both the view from the inside and outside of your windows. UNIQUE - Each design is completely unique and printed slightly translucent to catch. They are all approximately 16 cm x 10 cm in size. NO MESS - Static cling means no glue, just a fine spray of water to apply which means no lasting damage to your windows and your hummingbird decals can be moved easily and reused multiple times. Convenient and reusable: step 1, clean the window with a duster, step 2, spray a mist of water on the glass, step 3, peel the hummingbird window decal from the vinyl backing and place it on the window in any design; If you want to rearrange it, just peel it off and move it around. Color: multi-color Material: PVC Package Contents: 2 sheets (4 per sheet) x Hummingbird Anti-collision Window Decals Only the above package content, other products are not included. Note: Light shooting 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.