What I carry varies. I have an assortment of Benchmade, Cold Steel, Spyderco and Al Mar pocket knives. Most are plain edge with a 3.5" to 4" blade, 4" being preferred. All have a pocket clip. I lose them about as often as I lose my wallet, which is rarely. They get used many times every day.
At my first visit to my physical therapist she wondered about the big thing in my pocket and asked if it was a knife. She set me up but I did not make a lewd remark.
I showed her the knife and she said it was very big. I said well, I left my pistol at home. She laughed, being a vet.
