how deep of a cut requires stitches

A cut generally requires stitches if it is deeper than about ¼ inch (6 mm) or longer than roughly ½ inch (about 1.25 cm). If the cut is deep enough to show fatty tissue, muscle, or bone, or if the wound is wide and gaping open, it typically needs stitches to heal properly. Other indicators include cuts with jagged edges, cuts that do not stop bleeding after 10-15 minutes of applying pressure, cuts over joints or areas with a lot of movement, and cuts on the face for cosmetic reasons. If the wound continues to bleed heavily, spurts bright red blood, or the skin edges cannot stay together, stitches are necessary to prevent infection and promote healing.