I went a little overboard with short sleeve sheath dresses last month and bought more than enough to last me at least one more summer. One of my favorite styles is the v-neck sheath with cap sleeves. I especially loved the J. Crew Director Dress (also in super 120) and its H&M doppelganger. The two dresses are nearly identical in design (the H&M version is cut slimmer and longer with a deeper V in the neckline).
I am currently debating taking up the length of the white dress by an inch. As is I think the dress makes me look a little stumpier than I would like. It did satisfy my craving for a sleeved white sheath so I definitely consider it a good purchase.
H&M dress, Ann Taylor blazer + necklace, J. Crew bag, and YSL shoes