Our Mylar rolls come in 2 widths - 300mm & 600mm. The 300mm widths allow for cutting A4/A3 sheets and the 600mm allows for cutting A2/A1 sheets. We also sell grades 125, 190, 250, 350 microns. They are sold per meter, so choose your number of meters and you will get than in a continuous length. Great for when you need longer pieces for your projects.