DIY Projects & Crafts Sewing Reversible Hat By Martha Stewart Editors Martha Stewart Editors An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on September 20, 2018 Share Tweet Pin Email What You'll Need Materials Adult Overview Adult Brim Adult Crown Adult Side Child Overview Child Brim Child Crown Child Side 2 pieces medium-weight fabric in coordinating colors and patterns, 3/4 yard each Iron Disappearing-ink fabric marker Fabric scissors Fusible interfacing (optional) Sewing machine and sewing supplies Instructions Download the templates. The adult hat measures 22 inches around (fits a medium size); the child's hat measures 21 inches (fits ages 6 to 10). Wash, dry, and iron fabrics. Print and cut out templates for hat brim, side panel, and crown. Lay templates on first piece of fabric, trace with marker, and cut out. For a stiffer brim, lay brim template on fusible interfacing, cut out, and attach interfacing to wrong side of brim fabric. With right sides facing, machine-stitch center-back seam of side panel with 1/2-inch allowance. Press seam with iron. Repeat with brim. With right sides facing, pin crown to side panel. stitch with 1/2-inch seam. Trim seam allowance to 1/4 inch, and notch to ease curve. Repeat steps 2 through 4 using second piece of fabric. Returning to first fabric, pin brim to side panel, right sides facing, aligning center-back seams, and stitch with 1/2-inch allowance. Notch seam to ease curve. Repeat step 6 with second fabric, but leave a 4-inch opening.