Apparel, sporting equipment, and other items include magnetic securing systems (e.g., for holding a ball marker on a golf glove. Housings for such systems include a mount area defining a base surface that includes a magnet or is made from a magnetic material. At least two retaining walls extend from the mount area and together with the base surface define a receptacle for receiving another component (e.g., a golf ball marker) to be held by magnetic force. In such housings, a combined total perimeter length of interior surfaces of the retaining walls around the receptacle may be less than 50% of a total length around the perimeter of the component being held.