A company’s product range depth refers to the average variety of products offered within its different product lines. For example, the Signal brand’s toothbrush range comprises five distinct lines: classic (three models), technical (seven models), premium (five models), electric (two models), and children’s (four models). On average, this range has a depth of four products. It’s worth noting that the term “product range depth” is sometimes criticized, as it would be more accurate to refer to the depth within each individual product line. It’s also helpful to examine the concepts of range breadth and diversity for a comprehensive understanding of a company’s product strategy.