If you want to act out a western but you don't want to spend hundreds of dollars on a Stetson, you can make an origami cowboy hat instead. Since you'll want to be able to wear your hat, don't use traditional 6-inch origami paper. Use a 17-by-22 inch sheet of paper instead. For a sturdier hat, go with construction paper. Don't get anything thicker than that though. It will not fold easily and could tear.
Put the paper down in front of you with one of the 17-inch sides closest to you. Fold the top edge so that it meets the bottom edge. Then crease it tightly.
Use your ruler to measure the paper widthways. Measure 5 inches in from the left side and 5 inches in from the right side. Mark both spots by making a dot with your pencil. Then line the ruler up with the top edge of the paper and draw a 6-inch vertical line at each dot.
Measure 5 inches down from the top of the paper and draw a horizontal line, again lining your ruler's end up with the edge of the paper so your line is at a 90-degree angle to the page. You will notice this line will cross the other two.
Fold the left corner to meet the left intersection and the right corner to meet the right one. Crease.
Look at your paper. You will have two triangles in the top corners where you made your folds. Fold the bottom edge of your paper up so that it meets the bottom of these triangles exactly.
Flip the hat over and repeat the action on the back so the two sides are exactly the same. Now there is a hole in the middle of the hat for your head and a rectangular brim.
Measure 2 inches in from the left and right sides of the brim. Put pencil dots at each 2 inches mark at the brim's top. Flip the hat over and repeat. Then fold the bottom left and bottom right corners up to meet your pencil marks on both the front and back of your hat.
Fold the entire brim up at the line where the brim meets the bottom of the triangles you made in step three. Do this on both sides of your hat. Tape or staple as needed to keep your cowboy hat together.
Put your hand inside your hat and gently push the top of it outward for a more rounded look.