Before starting two pieces together, you need to make sure they match and won’t move while you stitch. Pins are traditionally sued to secure fabric pieces together. But I have found easier to make a couple of very loose cross stitches. I find several advantages to this technique when working with smaller patterns or complex shapes:
– When stitching a small piece, pins would get in the way.
– Pins can create a hazard, the stitches are perfectly safe.
– Pins may alter the shape and make the stitching less accurate.
So what I do is stitching a couple of cross stitches in the middle and at each end of the felt pieces (see picture below for an example). There is no need to make a knot at the end of your thread as these would be removed afterwards. But be careful not to stitch too tight as this may damage the felt.