Next, let's look at sleeves. Sleeves are more important than you might think. Too short and you look like you're in your dad's suit, too long and you look like you've outgrown SKIMS Long Sleeve Turtleneck Dress Obsidian Bridesmaid Dresses for Juniors Black Macy's H&m Basic Long Dress The Best Maxi Dresses From H&M PS Fashion REFORMATION Women's Kristen Long Sleeve Midi Dress in Ivory Lace trim size 4