"Size: The size of each hummingbird sticker is approximately 6 x 7.8 inches. This size is suitable for use on glass, patio doors or bay windows to prevent bird strikes on window glass. Printed on both sides: Colibri brackets are brightly colored on both sides; The light colors of the bay windows are visible from outside as well as from inside Attach them to the inside of the window. No need for glue Practical and reusable: Step 1 Clean the window with a cloth, Step 2 Spray water mist on the glass, Step 3 Peel off the Kolibri window from the vinyl back and place it on the window in any design. If you want to rearrange it, just peel it off and move it. material: Birds Collision Decals are made of high quality non-stick vinyl with double-sided printing, which is durable, non-toxic and odorless. 6 pieces Kolibri Window Adheres Anti-collision Window Stickers to prevent bird impact on Non-Adhesive Glass Vinyl Stick Colibri Stickers. Specifications: Size: 6 x 7.8 inches Material: non-adhesive vinyl. Feature: Colibri supports are printed on both sides. The bright colors of the windows are visible from the outside as well as from the inside; Collision protection sticker: Affix Kolibri sticker on the inside of the window. To avoid bird strikes on windows, do not use glue on windows, patio doors or bay windows. Instructions for use: Step 1: Clean the glass with a duster. Step 2: Spray a water mist on the glass. Step 3: Peel off the window from the vinyl underlay and place it on the window in any design. packaging includes: 6 x anti-collision window sticks/8 x anti-collision window sticks