2.3-2.5mm (0.1 inch) thickness, thicker than most products on the market ultra strong stickness that can stick on lightly textured surface,but can't stick on uneven and dirty wall like stone and brick walls compare to subway tiles,the 3D mosaic tiles are straight matche to install,easier installation and reduce wasting,like assemble blocks The wall stickers adopt enviroment friendly materials ensure the marble backsplash is eco friendly waterproof, heat-resistant and yellowing-resistant, with ultra-clear image. Coupled with years of experience in gel wall tiles, we ensure a longer product life Neonwink's Gel-Series wall tiles use environmentally friendly PU glue, which is easy to clean, waterproof, heat-resistant and yellowing-resistant. They are simple and convenient to install and can better meet customers' needs for high-quality wall stickers. They're simple and convenient to install, meeting customer demands for high-quality wall tiles. They feature a 2.3mm thicker design, rather than the commonly used 1.2mm thickness, to better accommodate personalized decor. Whether you're decorating an RV, kitchen, bathroom, laundry room, bedroom, fireplace, living room, or feature wall, the neonwink Gel-Series is a great addition to your interior wall decor.