I’m not 100% sure on the accuracy of this data, but if ever there was a place to paste this information, it is here.

Average Tiddy weight per boob by cup size, in Metric and Lemmy scales

A cup = 0.454kg = 1.1 Tins of Heinz Baked Beans in Tomato Sauce

B cup = 0.78kg =1.9 Tins of Heinz Baked Beans in Tomato Sauce

C cup = 1.023kg = 2.4 Tins of Heinz Baked Beans in Tomato Sauce

D cup = 1.388kg = 3.3 Tins of Heinz Baked Beans in Tomato Sauce

E cup = 1.950kg = 4.6 Tins of Heinz Baked Beans in Tomato Sauce

F cup = 2.35kg = 5.6 Tins of Heinz Baked Beans in Tomato Sauce

[Edit] I’m not sure if this is per boob, or per pair of boobs. More research required.