T categories for breast cancer T followed by a number from 0 to 4 describes the main (primary) tumor's size and if it has spread to the skin or to the chest wall under the breast. Higher T numbers mean a larger tumor and/or wider spread to tissues near . Apr 26, · The archetypal breast — round and full with a small point at the nipple — is considered the “standard” for breast type. It’s what most bra manufacturers model their designs after. But Author: Maisha Johnson.