The "stencil size" represents the size of the design. There will be approximately 1" of excess material around the design for ease of use. All stencils are made-to-order. Laser cut synthetic reusable stencil. The approximate individual leaf height will be as follows: 3" x 6" stencil = 0.75" leaves 4" x 8" stencil = 1" leaves 5" x 9.75" stencil = 1.25" leaves 6" x 11.75" stencil = 1.5" leaves 7" x 13" stencil = 1.75" leaves 8" x 15.75" stencil = 2" leaves 9" x 17.5" stencil = 2.25" leaves 10" x 19.5" stencil = 2.5" leaves 11" x 21.5" stencil = 2.75" leaves 12" x 23.5" stencil = 3" leaves 13" x 25.5" stencil = 3.25" leaves 14" x 27.5" stencil = 3.5" leaves About the material 250 micron/10mil Mylar: Flexible but sturdy, semi-rigid Polyester material. Milky white and glossy surface with medium transparency. Washable and reusable. Durable, tear resistant, solvent proof & easy to clean. Non-adhesive material. Can withstand 300° F/ 148° C application temperature.