tsukishiroaoba2 wrote in egl

A Bodyline sizing question.

Hello, everybody.
Today, I have a question for people who bought this Punk Yukata from bodyline.
http://item.rakuten.co.jp/bodyline/p192/
My body size is about 2L according to the sizing chart BL provided. Bust about 90cm, waist about 78cm.
But I am a tall girl who is around 170cm.
Would you recommend me to buy 2L or 4L???
Is the waist band tight or fairly loose??? Sometimes BL stuff go smaller than the size they provide and sometimes a lot bigger than the size they provide on their website...