Abstract: A stencil clip is used to apply a pattern onto an extruded concrete curb having a curved cross-sectional profile. The stencil clip is made of stiff but resiliently flexible sheet material pre-formed to match the cross-sectional profile of an upper portion of the curb, and may have at least one cut-out portion to define a decorative pattern or indicia. Alternatively, the stencil clip may be solid to serve as a blanking or masking stencil. The stencil has handle portions at its edges permitting the stencil to be clipped on and off the curb.