Size matters, and Sibanye-Stillwater (JSE:SSW) may find scale in its home country.Company CEO Neal Froneman recently spoke to Kitco News. The company is headquartered in South Africa.Froneman said a $20 billion market capitalization is more relevant and investable for the broader market. Sibanye is sitting at $12.5 billion. To build size, Froneman noted that South African miners are trading at a discount compared to their North American peers. Business Day reported that a tie up of the country's top miners—Gold Fields and AngloGold Ashanti along with Sibanye - would be in the national interest.