ding ding ding. All my WM shirts are like this. Short body, boxy chest/waist, slim arms and narrow shoulders. I like the fit though, it's different from what I normally wear and looks great with a longer soft tee under it (like in a lot of waywts lately). It is definitely a weird-ish fit since it's not really what most people are used to I guess. It's slim and boxy at the same time, but it doesn't billow which is why it can still look good.
That said, I have that shirt in a different color (same pattern but lavender instead of white) and it's one of my favorite shirts.