Our stencils are made with 14 mil Clear Plastic. Stencil Letter stencils are a great way to decorate any project, wall or craft. Each Stencil has 4 holes for easy hanging on any wall, foam board, cardboard or wood surfaces. Stencils are flexible and can bend around a round surface. for water based paints and ink wash with soap and warm water. The stencil size, is the size of the actual cut-out not the outside boundary edge. A size example of a fish stencil at 7.6cm will be 7.6cm on the longest side. Please use a ruler or tape measure for reference to better understand the stencil sizes. For stencils that require inner detail, you get both the stencil and the shape that is cut out of it. This is a 2 piece stencil. For stencils of this type, you first paint using the stencil without the inner design. After drying, place the inner piece over the stencil you painted and add the inner detail. For stencils that don't have inner detail you will not receive the inner piece.