Large Tailors Clapper. The Tailors Clapper is a must for sewing and ironing. It is used to press seams without burning. Used with steam from your iron, press the area with the clapper and hold for just a few seconds, it will leave a nice crisp seam. We offer this handmade clapper in beech wood. measures 11 1/2 in long, 3 in wide tapered down to 2 1/2 in and is 1 1/2 in thick. Both sides have routed grooves to offer easy handling and is unfinished to absorb the steam better. Colors may vary from the above picture, they may be lighter or darker depending on the variations of color in the wood used.