Abstract: Bias binding tape for one step sewing to the edge of the material to be trimmed, is formed as a single unit with a front tape portion, a rear tape portion and a base portion. The front and rear portions extend from the base portion in substantially the same direction to form legs of a bifurcated envelope which receives the material to be trimmed. In this way, both the front and rear portions may be sewn to the material at the same time, without the need for pinning or otherwise aligning two separate portions, or separate sewing of a front and a rear piece of bias tape. The base portion may include ruffles or other decorative trim as desired.