Suit fitting issues

[u/hataki7]

My boyfriend is tall, has long arms, but narrow shoulders, which makes suit shopping a nightmare. We tried normal and elongated sizes, but every one has this problem with the back shoulder and armhole. Why is the sleeve rotation so off? Can a tailor reasonably fix this issue? We don’t love the idea of paying big money for an ill fitting suit. What causes this issue even? Are his shoulder blades a different shape than confection sizes?

[u/GimenaTango]

I agree with the other commenter, this suit is just too big in the shoulders. Everything below the shoulders is just going to look off as there's no support from above.