What does it mean to have wide root breasts

Broad root breasts are breasts that go far to the sides of the chest. Usually these breasts are not very projected but they cover a large area of chest. When you look from top these breasts would like in the picture below 

Owners with broad root breasts have often difficulties determining where their breast ends on the sides and sometimes have problems with determining the correct bra size. In this case women should look for bras that have wider wires. Sometimes they have to go up in cup sizes to accommodate the width of the breast. The best styles for this type of breasts are bras that are balconettes and plunges. These bra style are also good fit for broad roots as these breasts require shallow cups.