The US size is first and UK is second the cups are the same F is E, G is F, H is FF, I is G, J is GG, K is H,L is HH, M is J, O is JJ FREYA 4101 JOLIE UP TO G CUP UK SIZING FREYA JOLIE 4102 BALCONY BRA UP TO J CUP UK SIZING FREYA 4791 LACY UP TP G CUP UK SIZING FREYA LACY 4792 UP TO K CUP UK SIZING FRAYA ARABELLA PLUNGE 5721 UP TO G CUP UK SIZING FRYA ARABELLA BALCONY 5731 UP TO J CUP UK SIZING FREYA TEAGAN 1181 UP TO G CUP UK SIZING FREYA TEAGAN 1182 UP TO K CUP UK SIZING FREYA ELLIE 1131 UP TO G CUP UK SIZING FREYA ELLIE 1132 UP TO K CUP UK SIZING FREYA FAYE 4201 UP TO G CUP UK SIZING FREYA FAYE 4202 UP TO K CUP UK SIZING FREYA DAPHNE 1141 UP TO G CUP UK SIZING FREYA DAPHNE 1143 UP TO K CUP UK SIZING FREYA ROXANNE 1161 UP TO H CUP UK SIZING FREYA RIO 3510 BALCONY UP TO H CUP UK SIZING FREY BEAU 1101 UP TO H CUP UK SIZING Any questions? Please call us at 800-858-3887. buststop@telepath.com