Here's an inexpensive way to make a pattern for a hat. I found a cute yellow striped hat at the thrift shop, but wanted to use it to make a pattern. I found a shirt at the thrift shop in a pretty blue floral print that I thought would be perfect for a feminine cap.
Step 1: Supplies
You will need an old hat, mine was the "Newsboy" type. Sewing machine, scissors, thread, denim scrap, stright pins, iron, measuring tape.Freezer paper or newspaper for the pattern and seam ripper. Elastic is optional. For the brim of the hat I used a scrap of denim with, what I like to call "Bacon paper". The thin, plastic sheet that bacon is placed on inside the packaging. It will help hold the shape of the brim and yet its thin enough for the sewing machine needle to go through. You can purchase heavy weight interfacing if you like.