Depends on how far you expect to be from civilization, and how big an owie you want to treat.
My range kit is tiny. It fits in a $.99 red hinged bath soap case: A couple of adhesive bandages, gauze pad, magnifier, tweezers, antibiotic ointment, cheap rubber tournequet, nitrile gloves, two naproxen sodium, and one papaya tablet. In case of a venomous sting or bite, the papaya tablet is crushed, wet, and placed on the wound.
Making your own kit is like reloading your own ammo: Less expensive, and customized to your needs.
