size 5(M) will generally fit bra sizes 32-34C, 34-36B, 36-38A (1ibs 4oz), 6" x 7" over the top, 4" x 5.5" across back, 0.15" protrusion size 7(XL) will generally fit bra sizes 34DD, 36D, 38C, 40B etc (2.2ib), 7.5" x 8.5" over the top, 4.5" x 6" across back, 2.2'' protrusion Size 8(2XL) will generally fit bra sizes 36DD, 38D, 40C, 42B etc (2.10ib ), 7.5" x 8.9" over the top, 4.9" x 6.5" across back, 2.5'' protrusion Size 9(3XL) will generally fit bra sizes 34F, 36E, 38DD, 40D,42C,44B etc. (3ib), 8.2" x 9" over the top, 5" x 6.5" across back, 2.8'' protrusion Size 10(4XL) will generally fit bra sizes 34FF, 36F, 38E, 40DD,42D,44C,46B or 48A etc. (3.7ib ), 9" x 10" over the top, 5" x 6.9" across back, 3'' protrusion size12(6XL) will generally fits bra sizes 42E 44D 46D 48B etc. (4.6ibs),9.5"x11" over the top,6"x 7.9" across back,3.5" protrusion size 13(7XL) will generally fits bra sizes 38H, 40E, 42F, 44E, 46D etc. (5.4ibz) 10"x12" over the top 6"x 8" across back below 3.5" protrusion