What happens next?

How to make sheer curtains
Use measuring tape to measure window height from the point where the curtain rod will be to the bottom of the window.
Decide how much longer you want your curtains to be than the window.
Measure length of the curtain rod.

Options are:
1). Add 4 inches (10 cm) of excess insulation to the measured length. Bring 1 to 2 inches (2.5 to 5.1 cm) of insulation to the measuring tape to measure an additional length of the rod..
2). Use an x-acto knife to make straight lines across the length. Cut a 1/8 inch long strip that measuring from the one end of the window to the other..
3). Measure circumference of the curtain rod and add 1 inch (2.5 cm) to allow for a seam. How full your curtains are is a matter of taste..
4). Depending on the room, the curtains should be 10 inches or 15 centimeters. Cut the curtains to the desired length at the center of the window frame..
3).