Q&A for How to Crochet a Scarf

It all depends on the thickness of your yarn and how wide or narrow you want the scarf to be. For a thicker scarf, you'd probably want at least 20 chains.

Yes. You can either make standard granny square shapes and sew them together to get the right length, or you can use the "mile-a-minute" technique to make a scarf as long as you want.

You don't need any certain amount of stitches based on the size of the needle. Because this isn't knitting, you can create a thousand stitches from a 5.0mm. hook.

I think that what you did was skipped some stitches; that's easy to do when you're a beginner and doing the first row from the chain. Undo your work and go through each stitch, making sure you don't miss any.

The needle is for weaving in the loose ends. When you begin a chain, you make the slip knot a couple inches from the end. When your work is done, you take the end of the yarn and weave it back into your work so it is seamless and does not show.

It might be thick because of the stitch that you used. For a scarf you typically want it to be thick, and warm, so you might want to leave it this way. But you also might not. Just take out your work and try again.