That could work for the sleeve, together with another pattern perhaps. The dress itself is more like a jacket in the middle, since it buttons all the way down. Then a white petticoat under that. So we should try to find a jacket-like pattern with an upturned neck. The upturned neck can be altered to be the white piece of the dress, we can replace the sleeves in the pattern with the puffy/straight combo, and then make the cuffs and sew them on.