Here's the reply I got:
Thank you for your mail to BABY.
I'm sorry for our tardy reply and poor English !
I measured the size of 131-203
it streches 94cm at the chest and 80cm at the west on maximum.
Please feel free to ask us if you have any other questions.
Thank you for your time, and we look forward to hear from you again !
From Rika of BABY, THE STARS SHINE BRIGHT
Just in case anyone wanted to know. :)