With Clover Press Perfect Hot Ruler you can measure mark fold press deep hems press long hems and miter corners. It is heat resistant and you can press directly on the ruler. It can be used with dry or steam irons. The unique non-slip surface holds fabric in place for precise results. Marks are at 1/8 inch increments and it also has 45 degree lines on each end. 2 1/2 x 10 inch.