What are the dimensions of this? I need this for a standard bathroom small window on bottom window and what else is needed to install this?

This material is 36" wide and is sold by the foot (12") as one continuous roll. The quantity ordered determines the length received. To view our instructions for How to Measure, follow this link: https://www.decorativefilm.com/mm5/graphics/00000001/How%20To%20Measure%20-%20Standard_2.png Our installation tools are available here: https://www.decorativefilm.com/accessories-installation-tools