Measure the length (top to bottom) of the television screen; add 1 inch to this measurement for seam allowance. Then, measure the depth of the screen. Add this to the total length. Lastly, multiply this measurement by 2 to cover both the front and back of the television. For the cozy pictured, Page left the base of the television exposed; if you want to cover the entire television, measure from the top of the screen to the table it will be sitting on, adding 1 inch for seam allowance and multiplying this measurement by 2 to cover both the front and back of the television.
Measure the depth of the screen. Then measure the width of the screen. (You will need to add 1/2 inch on each side for seam allowance.)
Select desired fabric and cut to your specific measurements.
Fold fabric square in half, with the desired side of fabric facing in.
Sew 1/2 inch in on both short ends to create a hem.
Sew up the left and right sides with a straight stitch allowing for 1/2-inch hem.
Next, you will need to create a gusset, which is a simple triangular insert that creates a box edge that tailor-fits the cozy to the television screen. To create the gusset, pinch the corner of the top-right seam of the cozy. The pinch should be parallel to the seam hanging down the side of the cozy; it will form a triangular shape. Stitch a seam across right above where the fabric begins to taper.
Cut off any excess fabric from triangle. Repeat with top left corner.