Create custom size boxes with ease. Double sided with imperial and metric measurements. Designed to create box lids slightly larger for perfect fit. Take your papercrafting to a whole new dimension. Measure, score and fold accurately with this innovative boxer board. One side includes imperial (inch)measurements up to 8 inches in ⅛” increments, and the reverse side features metric (cm)measurements up to 20cm at ½cm increments. The lines at each edge are engineered differently to enable you to create custom size boxes with ease. Simply use two identical size pieces of cardstock, and this board will make your lid slightly larger to fit perfectly over your box base.