When a piece of fabric or an apparel product is washed, its size (dimension) get shortened from its original size after the wash (laundry process). The process of shrinking the fabric's original size is called shrinkage. In the subsequent washing, the clothes shrink more.

On the other hand, When the fabrics in our shirts are made from different fabrics are held together by hydrogen bonds, the same bonds found in water molecules. Hydrogen bonds make fabrics very absorbent, so when moisture is added, water penetrates and separates these bonds. As the moisture evaporates, new hydrogen bonds form and lock in place wrinkles that formed when the shirt was wet