Clover N Double Tracing Wheel, Soft/Gingko Teeth, Replaceable Teeth, White Double Tracing Wheel Design This excellent tool features a design with two rollers, allowing you to mark seam allowances and cutting lines simultaneously. (Can also be used with a single tooth) The tooth spacing can be adjusted in 5mm increments, making it convenient. You can swap between gingko teeth and soft teeth. Size: Approximately 14.5cm (length) x 4cm (width) I have kept this in my sewing box without using it. Please understand that this is a home-stored item before purchasing. Simple packaging.