The packaging of each clear outdoor light clips set includes 30 clear hooks and 30 waterproof adhesive backings. The dimensions for each clip are 0.6 inch L x 0.55 inch W. Our outdoor string light hooks come with highly adhesive stickers that are straightforward to install, requiring no tools and can be done by one person. They provide strong hold and can be easily removed without leaving any residue on walls. Using waterproof double-sided tape with strong adhesion, these clips are suitable for both indoor and outdoor use, in all seasons, and can withstand wind, rain, high temperatures, storms, snow, hail, and other harsh weather conditions. They offer excellent fixation and protection for your string lights. Please note that the hook might not adhere well if applied on dusty or uneven surfaces. For optimal stability, it is recommended to use the hooks on smooth and clean surfaces prior to installation. These hooks stick to any dry and smooth surfaces like wood, metal, glass, ceilings, solid walls, and tables. They are suitable for doors, tiles, flat walls, soft cornices, finished fences, metal, and wood surfaces. They are not recommended for use on rough, wet, oily surfaces, as well as wallpaper and dusty walls. Type: Hooks Feature: Eco-Friendly Color: Transparent Material: PA Package Contents: 30 x Hooks Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm.