You will need smaller pieces of fabric, preferably of the same type of fabric and thickness. I used two types of flannel and a thicker cotton fabric and it worked just fine. The pieces need to be the same width.
Overlap pieces and zig-zag stitch back and front, this way both sides of the scarf will look the same.
Keep adding your pieces like this until your scarf has reached your preferred length.
Fold edges and sew, make sure you fold twice, you don’t want your scarf to fray.
And that’s it.
Other great tutorials:
Rock Mosaic turned old checked shirts into a cool scarf. Very simple and basic tutorial that generates great results – especially with the added studs! This was the DIY that I was mostly inspired by when I made my scarf. Also, make sure you check out the rest of this site (if you haven’t already), this is one of my absolute favorite DIY-blogs!
This Instructables DIY is s bit more difficult to do, but you get a sturdier scarf with a defined front and back.
… And here are some cool patchwork scarves that I found on Etsy :)