The Vintage Wooden Hat Sizer Stretcher Block Tool is a unique and antique tool used for sizing and stretching hats to achieve a perfect fit. Made from a combination of wood and metal, this tool is durable and reliable for shaping hats in size 7 1/2. With its vintage design and functionality, this hat sizer stretcher block tool is a valuable addition to any collector's arsenal, offering a timeless and practical solution for achieving a fitted hat with precision and ease. vintage wooden hat stretchers, keepers, sizer. Size 7 1/2 . Goes up to 8 inches. There’s a number 7 stamped into it. Please see photos for measurements If you need more photos please ask. I ship FAST!