Cup size (difference between bust circumference and underbust band size [corresponds to the underbust circumference rounded to 5 cm] in cm [All cup sizes above L are not natural or realistic, meaning they were achieved through some kind of body modification, e.g. drugs]: AAAA [2.6 - 5.0 cm], AAA [5.1 - 7.6 cm], AA [7.7 - 10.1 cm], A [10.2 - 12.6 cm], B [12.7 - 15.2 cm], C [15.3 - 17.7 cm], D [17.8 - 20.3 cm], DD [20.4 - 22.8 cm], E [22.9 - 25.3 cm], EE [25.4 - 27.9 cm], F [28.0 - 30.4 cm], FF [30.5 - 33.0 cm], G [33.1 - 35.5 cm], GG [35.6 - 38.0 cm], H [38.1 - 40.6 cm], HH [40.7 - 43.1 cm], I [43.2 - 45.7 cm], II [45.8 - 48.2 cm], J [48.3 - 50.7 cm], JJ [50.8 - 53.3 cm], K [53.4 - 55.8 cm], KK [55.9 - 58.4 cm], L [58.5 - 60.9 cm], LL [61.0 - 63.4 cm], M [63.5 - 66.0 cm], MM [66.1 - 68.5 cm], N [68.6 - 71.1 cm], NN [71.2 - 73.6 cm], O [73.7 - 76.1 cm], OO [76.2 - 78.7 cm], P [78.8 - 81.2 cm], PP [81.3 - 83.8 cm], Q [83.9 - 86.3 cm], QQ [86.4 - 88.8 cm], R [88.9 - 91.4 cm], RR [91.5 - 93.9 cm], S [94.0 - 96.5 cm], SS [96.6 - 99.0 cm], T [99.1 - 101.5 cm], TT [101.6 - 104.1 cm], U [104.2 - 106.6 cm], UU [106.7 - 109.2 cm], V [109.3 - 111.7 cm], VV [111.8 - 114.2 cm], W [114.3 - 116.8 cm], WW [116.9 - 119.3 cm], X [119.4 - 121.9 cm], XX [122.0 - 124.4 cm], Y [124.5 - 126.9 cm], YY [127.0 - 129.5 cm], Z [129.6 - 132.0 cm], ZZ [132.1 - 134.6 cm], ZZZ [134.7 - 137.1 cm], ZZZZ [137.2 - 139.6 cm] ([German breast cup sizes]: AA [10 - 12], A [12 - 14], B [14 - 16], C [16 - 18], D [18 - 20], E [20 - 22], F [22 - 24], G [24 - 26], H [26 - 28], I [28 - 30], J [30 - 32], K [32 - 34], L [34 - 36], M [36 - 38], N [38 - 40], O [40 - 42], P [42 - 44], Q [44 - 46], R [46 - 48], S [48 - 50], T [50 - 52], U [52 - 54], V [54 - 56], W [56 - 58], X [58 - 60], Y [60 - 62], Z [62 - 64], ZZ [64 - 66], ZZZ [66 - 68]; [US breast cup sizes]: AA [7.62 - 10.16 cm], A [10.16 - 12.70 cm], B [12.70 - 15.24 cm], C [15.24 - 17.78 cm], D [17.78 - 20.32 cm], E [20.32 - 22.86 cm], F [22.86 - 25.40 cm], G [25.40 - 27.94 cm], H [27.94 - 30.48 cm], I [30.48 - 33.02 cm], J [33.02 - 35.56 cm], K [35.56 - 38.10 cm], L [38.10 - 40.64 cm], M [40.64 - 43.18 cm], N [43.18 - 45.72 cm], O [45.72 - 48.26 cm], P [48.26 - 50.80 cm], Q [50.80 - 53.34 cm], R [53.34 - 55.88 cm], S [55.88 - 58.42 cm], T [58.42 - 60.96 cm], U [60.96 - 63.50 cm])