Place your now attached front and back with the good side up.
Place a sleeve on top if it with the good side down
Align the top of the sleevecap with the shoulder seam, your sleeve should lie over your front/back extending to the other shoulder seam
Pin sleeve in place along the entire armhole. There’s a bit of sleevecap ease, which means that the sleevehead is slightly longer than the armhole. Ease this in the top part of the sleeve head while pinning.
Cut a piece of ribbing that is this length and 6cm/2.5inch wide
Fold the ribbing double with the good side outward, and pin it to your neckopening starting from the back
The cut off side of your ribbing should align with the edge of your neck opening, while the ribbing extends over your sweatshirt
Pin the ribbing in place around the neck opening, starting at the back and stretching it gently as you do so
First, join the ribbing at center back, with good sides together. As you’ve been stretching the ribbing as you were pinning it, it will be too long. Simply cut that away
Cut a piece of ribbing that is (twice this length - 2cm/1inch) and 7cm/3inch wide
Fold the ribbing double along the longest side, and sew together the edge so you have a continuous ring
Turn your Sven inside-out
Fold the ribbing ring with the good side outwards, and slip the folded side into your inside/out Sven sleeve
Align the cut off side of the ribbing with the edge of the sleeve and pin it in place. The ribbing is a bit shorter, so stretch it a bit while pinning to work this into the sleeve.
Cut a piece of ribbing that 1.9 times this length and 7cm/3inch wide
You may need to attach different pieces if your ribbing fabric isn’t wide enough
Fold the ribbing double along the longest side, and sew together the edge so you have a continuous ring
Turn your Sven inside-out
Fold the ribbing ring with the good side outwards, and slip the folded side into your inside/out Sven body
Align the cut off side of the ribbing with the edge of the body and pin it in place. The ribbing is a bit shorter, so stretch it a bit while pinning to work this into the body.