Yes. A medium knife sits in the size range that most users find ideal for concealed carry. The blade is large enough to handle real cutting tasks and self defense use while small enough to carry under clothing without printing or shifting around. A fitted leather sheath, pocket clip setup, or inside-the-waistband rig keeps the knife secure and accessible whether you're on foot or in a motor vehicle.
Concealed knife laws vary by state and by location, so check the rules in your area before carrying. Some places treat fixed-blade knives, switchblade knives, automatic spring-assisted knives, ballistic knives, and folding knives differently, and certain government buildings, school grounds, university buildings, and other specific locations may restrict carry regardless of blade type. Items like metallic knuckles, stun guns, and similar devices may face their own rules separate from blade knives, and businesses serving alcoholic beverages sometimes post additional restrictions. When in doubt, consult your local district attorney or law enforcement agency for guidance specific to your area.