Note: I use the Magic Circle because you can pull the center of your work tightly closed. There are a lot of great videos on how to make a Magic Circle on YouTube, if you still are unable to make this just make the:
Ch 2. Rnd 1: Work 6 sc in first chain. Place marker in first stitch for beginning of round; move marker up as each rnd is completed in place of the Magic Circle.
The combination of the two yarns will be thick make sure not to make your stitches to tight or to loose.