18. Place the purse body on top of the purse bottom rectangle. Line up the side seams of the body with the center mark on the narrow edges of the bottom piece. Line up the pins marking the center of the purse on the front and back with the center marks on the long sides of the purse bottom (figure J). The purse body will be sewn to the bottom with gently rounded corners while the corners of the bottom itself remain pointed and will extend beyond the purse body (figure K). 19. With the purse body facing up, starting at the side seam, machine stitch the body to the bottom, about 1/4-inch from the edge, gently easing the curve at the corners, and matching up the center marks as you go (figure L).
20. To make a shoulder strap from the reserved piece of ribbing, fold both edges of the ribbing inward to the center, slightly overlapping (figure M), and stitch the entire length of the strap to secure. Stitch another seam on each side of the center seam along the length of the strap.
21. Fold down the ribbing on the top edge of the purse to the outside to create a "collar".
22. Pin the shoulder strap to the inside of the purse at the side seams, adjust and cut to desired length.