Isaac LievWomen's Maxi Cardigan - Casual Open Front Long Sleeve Full Length Round Hem Flowy Drape Lightweight Duster Sweater

Is the material light enough for early fall or even summer?

how long is this sweater and does length vary with size? I ordered an XL and it's a bit too long, will the large be shorter?

Is this tight fitting around the arm/shoulder area? I noticed with Asian sizes these seem to be not proportionate to the rest of the duster.

Is it dressy enpugh to wear over a pantsuit for an outdoir fall wedding?