I found this pattern on the Internet, designed by Bethany Dailey. They are extremely easy to knit, and look great! What I appreciate especially that they are knit in one piece, and in the end there are only a few seams to sew. Ms Dailey has created two versions of this pattern, child size and adult size, below are the instructions for adults.
I won't be posting the instructions on this blog, since it is not my pattern to distribute, but I am sure Ms Dailey won't mind a link to hers. (I tried to contact her, but never heard back...)
Here is the link to the original pattern in PDF format... and below the accompanying video.