First of all. Make your pattern. I just cut out something that looked much like the picture. Mine is 140 cm "long" (from A to B) and 55 cm "high" (C to D). Because my pattern paper wasn't large enough I had to do my pattern in 3 pieces (e, f and g).

(You probably can't see A and B in the picture, but A is the end of the left side, and B is the end of the right side)

Place the pattern on the fabric

And cut out with 1 cm seam allowance

Sew the pieces e,f and g (of the same fabric) together right side on right side, and also the "back of the head" (-shown with pink on the picture). Now you actually have two hat/scarfs. (Mine: One in flower fabric and one in grey)

Now sew the two hat/scarfs together - right side on right side. EXCEPT! Leave a small part open (shown with pink in the pic)

Turn the scarf around through the hole.

Now. To make a finish, sew about 0,5 cm around the entire hat/scarf - while doing this you also close the remaining hole.

Done.