Tricky Size

Sold a set of bra yesterday. The buyer is young 21 years old woman. Hers is very tricky.
From first measurement, her size was 28 F (very petite body with big boobs) but I urged her to try 28H instead because from my experience, F would not fit because her boobs is big and heavy. As I've predicted, 28 H not fit at all, just able to closed the cup half way through. After measured the gap which was 4 cm (28 K ), I order size 28 I, J and K (to be sure)from Jakarta.
Testing second time, we found out that 28 K cup suited the best because able to covered all her breast but the base was still too large for her. After long discussion with Cik Fanny at Jakarta, Cik Fanny decided she should wear size 28I with cup 28 J instead and because her purpose to firmer and smaller her boobs, she cup should hold the breast comfortable tight.
The custom made bra was arrived on Sunday and she tried them out yesterday. Gladly , they just fit like gloves. The bra able to hold her breast firmly and the enlarged shoulder belt are comfortable to wear.
She's very satisfied with the bra and promised me to promote to her friends.
Thank you......