I couldn't find directions online. I am not the best at explaining things so I hope this makes sense. Cut your fleece length wise the length you want your scarf. I would say 1.5 yards for an adult. I would say 8 inches wide. That would give you a two inch center when finished. Depending on how thick and fluffy you want your scarf you need at least two of those length and widths. I know someone that uses 6. You lay those on top of each other and sew down the length of the scarf all the way through all layers of fleece. Then cut 3 inch length 2 inch width strips on both sides all the way down.
OK I told you I am not good with directions. If something doesn't make sense please let me know and I will try to explain it better. Hope it turns out great and you have fun making it!