Hi everybody, i'm a newbie in IH denim and especially in the sizing.
I would like to buy IHxB01xRAW but i don't know what size i have to take.

I hesitate between 30 and 31.
I am wearing Edwin ED-71 raw selvage size 31", denim APC new standard size 31", LVC 1967 505 size 31".

Should i take the same size or one size down. I like to wear my denim with no washing and i know sometimes it's hard to wear the raw denim during the first week to have a good fit after many wearings.

Thank you very for your help.