The size of the bra is defined by:

1) size (below table matches) 2) the depth is determined by a letter from A to H
France Europe US/UK
80 65 30
85 70 32
90 75 34
95 80 36
100 85 38
105 90 40
110 95 42
115 100 44
120 105 46


Below the table corespondances for pants:  

France Europe US/UK
Général

Aubade
Lejaby

Antigel
Charmel

38 1   36 XS
40 2 1 38 S
42 3 2 40 M
44 4 3 42 L
46 5 4 44 XL
48 6 5 46 XXL
50   6 48 3XL
52     50 4XL
54     52 5XL