I normally size XXL in other IH shirt and take the plunge with XL in this. According to site, this cutting is a bit larger than normal IH shirt, so it should be ok, otherwise i hand it over to my wife.
Very random pic… The decision to buy the IH-9634Z superblack jeans was partially made because I knew I'd finally be able to wear this shirt more... It's incredibly beautiful, both this and the indigo version.