Ouch.This has been my experience.
I bought a San Mateo from Mirror Ball in japan, they recommended i order the same size as my LaBrea (42) saying it would fit the same. On arrival the SanMateo was much much smaller and didn't fit.
I contacted the store asking if they would consider exchanging the jacket for a size 44, acknowledging the fact that their policy said no returns, but mentioning that i had ordered the 42 following their advice.
I sent three emails, all were ignored when they had always answered within hours beforehand.
NO returns means NO returns, don't even ask...
I am waiting for more information from Standard and Strange. That is sounding more and more the safest option.