1. When wearing sleeves, the key factor that determines whether the sleeves are comfortable or not is the sleeve mountain. The higher the sleeve is, the more uncomfortable the sleeve will be and the more difficult it will be to lift the arm.

2. The smaller the height of the sleeve, the more comfortable the sleeve will be. For example, the sleeve height of sportswear and T-shirts is within 10cm. After putting it on, if the arms hang down, there will be many wrinkles under the armpits.

3. For sleeves with relatively high sleeve height, such as those on suits, when the arms droop, there are almost no wrinkles under the armpits. They are very beautiful, but it is very laborious to lift the arms.

4. Therefore, if you want to make the sleeves comfortable, when drawing the sleeve cutting diagram, you must set the sleeve height to a smaller size. After the sleeve height is reduced, the sleeve fat will increase accordingly. It depends on the balance with the larger body, otherwise, it will need to continue to be adjusted.