The Easy Crossbody Bag is crocheted flat in one long piece and at the end you will be folding it in half and sewing only the single crochet section together. The shoulder strap is made separately and also sewed on at the end. You can use either a button or a large bead to close the flap. I have tons of large beads so that is what I used for mine. The pattern is written for one size but if you want to make it larger you definitely can.