Bands

	30	32	34	36	38	40	42	44
Victoria's Secret	30	32	34	36	38	40	42	44
Fifty Shades Darker By Coco De M	30	32	34	36	38

	Victoria's Secret	Fifty Shades Darker By Coco De M
30	30	30
32	32	32
34	34	34
36	36	36
38	38	38
40	40
42	42
44	44

Cups

	0	1	2	3	4	5	6	7
Victoria's Secret	AA	A	B	C	D	DD	DDD	G
Fifty Shades Darker By Coco De M		A	B	C	D	DD	E

	Victoria's Secret	Fifty Shades Darker By Coco De M
	AA
1	A	A
2	B	B
3	C	C
4	D	D
5	DD	DD
6	DDD	E
7	G

Uses USA sizing

Also labeled as: EU

Victoria's Secret manufactures some bras sized S/M/L

Uses UK sizing

Fifty Shades Darker By Coco De M manufactures some bras sized S/M/L

This means that this brand at some point used some way to match their cups, from their main sizing system to other regions, for example:

UK	D	DD	E	F	FF
US	D	E	F	G	H

On this fictitious example, E cups in US correspond to DD cups in UK.

Later, at some point they decided to change how they do their cup conversions, in this case:

UK	D	DD	E	F	FF
US	D	DD	DDD	E	F

Note the introduction of DD, DDD cups shifting now E cups match to F cups.

Now, people that was buying by US sizes will now be confused on why things don't fit the same.

Click the "Sizing information" link to see what they changed.