Designer follows its own size guide, please refer to the below:
0 A-B cup = UK 8/ US 4/ IT 40 0 C-D cup = UK 8/ US 4/ IT 40 1 A-B cup = UK 10/ US 6/ IT 42 1 C-D cup = UK 10/ US 6/ IT 42 2 A-B cup = UK 12/ US 8/ IT 44 2 C-D cup = UK 12/ US 8/ IT 44 3 A-B cup = UK 14/ US 10/ IT 46 3 C-D cup = UK 14/ US 10/ IT 46