1. The number of folded ribs is different, As the name suggests, the 3 fold umbrella more than the 2 fold umbrella a rib.

2. At the same umbrella size, when the umbrella is closed. 2 fold umbrella is longer than 3 fold.

3. The suture method and the suture position are different. In the 2-fold umbrella, the seam is in the middle of the first long rib and the second long rib. In the 3-fold umbrella, the seam is in the middle of the second long rib and the third long rib. Because at the time of opening, the first long rib of the 2-fold umbrella is not in close contact with the umbrella cloth, so when the first section is stitched, the umbrella cloth and the umbrella rib are linked by a long line.

4. The ribs are different in size. In the two-fold umbrella, the short rib is longer than the first long ribs. In a 3-fold umbrella, the short rib is shorter than all long ribs.

5.ribs link position is different, In 2 fold umbrella, long rib first links short rib link second long rib. in 3 fold umbrella, short rib link first long rib, first long rib link second long ribs, the second long rib links the third long rib.