Decoration-making assist tool and method for making a decoration item

A decoration-making assist tool for making a decoration item by sewing cloth, the tool comprising:

• a first plate and a second plate each including a straight base edge and a peripheral edge connected to ends of the base edge;
• and
• a connecting portion connecting the first plate and the second plate to each other at the base edges such that the first plate and the second plate are pivotable relative to each other;
• wherein:
• the peripheral edge of the first plate and the peripheral edge of the second plate are substantially symmetrical with respect to the connecting portion;
• the first plate and the second plate are foldable to overlap each other;
• the first plate includes a first and a second recesses indented inward at the peripheral edge and a first group of elongated holes including a first to an Nth elongated holes spaced from each other, where N is an integer equal to or greater than two;
• the second plate includes a second group of elongated holes including a first to an (N+1)th elongated holes spaced from each other;
• each of the elongated holes of the first group includes opposite ends positioned adjacent to the peripheral edge of the first plate, and each of the elongated holes of the second group includes opposite ends positioned adjacent to the peripheral edge of the second plate;
• and
• when the first plate and the second plate overlap each other, the first recess and one end of the first elongated hole of the second group communicate with each other, another end of an (i)th elongated hole of the second group communicates with one end of an (i)th elongated hole of the first group, where i is an integer satisfying 1≦i≦N, another end of the (i)th elongated hole of the first group communicates with one end of an (i+1)th elongated hole of the second group, and another end of the (N+1)th elongated hole of the second group communicates with the second recess.