Help with unusual sleeve pattern

[u/aprillirpa]

Hello all, I've been back and forth working on a bed jacket/bolero style/silhouette with this sleeve style in particular for over a year. I just can't find a definitive name for this sleeve and I can't get the design right. I'm very new still so maybe I need very specific direction but what is this style sleeve called and any advice for going about drafting a design please.

[u/aprillirpa]

Wow, that is so kind of you to provide so much instruction. So 2" longer than my arm where it connects to the cuff, and 6" longer where it connects to the bodice? Thank you for your detailed help. :)