agreed with Daan and audit30 on the krooley jogg sizing! if you will size down, you will have a lot of extra "denim" on the crotch and back. even if the legs will be ok, that "loose" crotch will kill the fit.
it only looks like it's "loose" because it's on the clothes hanger and tee is made from viscose (very thin and lightweight, great for summer). the printing is done from the inner side (reverse side), so there is a effect of worn print from the obverse.
sizing is standard, i'm L in DBG and L fits like a gloove. but sometimes some t-shirts from standard diesel line were short / small in size L.
Available in S, M, L and XL, so what's the problem?
It's Jake re-release, could be 2011 or 2012. Not sure.
Inner leather tag seems OK and has signs on standard wears, maybe few gently washes. Regarding odour, there is no "special" odour of DH jeans. Just hand-wash in cold water and detergent for color / black clothes.
It looks like scarf over the tee (named t-round dev I have that t-shirt in round neck and also v neck version - different name).
Round neck version: