/cgl/ - Cosplay & EGL

How accurate is body line's sizing?
I'm torn between the 2L and 4L for their long sleeve sailor uniform. (Costume 573) 2L fits me (??) but apparently their sizes run smaller than what is depicted. I'm Asian so I'm not sure if it's because of western differences or what
Should I go with the 4L? 5L? L?

Here are my measurements:
35.4 90cm hip
76cm waist
37 cm boob 97cm
50cm arm length
65cm leg length
39cm shoulder
154cm height
--2L--
Blouse
Length 44cm
Bust 102cm
Waist 96cm
Shoulder length 39cm
Sleeve length 60cm
Skirt
Length 40cm
Waist 72-76cm
--4L--
Blouse
Length 47cm
Bust 110cm
Waist 104cm
Shoulder length 41cm
Sleeve length 63cm
Skirt
Length 42cm
Waist 80-84cm

I'd very much appreciate any help.