Debbie, I have a Husquvara Designer 1 that is about 25 years old . I set the length of stitch at 3.0 and the width at 2.5. It is a double blanket stitch that puts down two layers of thread. The stitch goes side,back, side, ,back forward,back forward. I use what ever thread I have that matches the applique . I have a lot of Mederia rayon colors in 40 weight. I match the bobbin to the top color. I use the thread colors as added interest. Usually I go a couple shades lighter or darker than the applique. That way you see the stitch pattern. HelenW