Placemats are usually between 12” x 18” to 14” x 20”. Make sure yours will fit on the table at least two inches away from the edge of the table runner. You may want to make one or two extra placemats in case you need a replacement in the future. Add four inches to width and four inches to the length (two inches on each side). This is the total size fabric you’ll need for each placemat.
Lay one yard of upholstery fabric pretty-side down on your work surface then lay the fusible bonding web on top of that. Lay the contrasting lining, pretty-side up on top of that. Insert a few pins to hold the layers of fabric in place. Start ironing in the middle of the fabric and work your way out so you don’t get any bumps. If necessary, use a piece of non-stick ironing sheet to protect your fabric. Repeat the process for all your placemats.
Fold the edge of the fabric in a 1/2” on all the long ends and iron flat. Fold one more time, another 1/2” and iron flat. Cut a strip of the fusible webbing to size and place it between the layers of the double hem and iron on with steam. Run the iron back and forth a few times and make sure it’s stuck together. Repeat the hem on the shorter sides.
Runners look the best when they are 1/3 the width of the table, so for the finished width of the runner, divide the width of the table by three. Add two feet to the length of your table for the length of the runner. Add four inches to both the width and length (two inches on each side) for hem allowance. That’s the total size of fabric you’ll need.