I have been eyeing this linen-blend peplum utility dress
for the longest time and I finally bought it when Banana was having their 1/2 off sale (currently only $60, online). The dress is lightweight and very fitted but still appropriate for the office. The only downside is that you'll need to steam/iron it before and after wear because it wrinkles very easily. It's also dry clean only.
For reference, I'm 5'4'' and 115 lbs and I wear a 2 regular. The top portion is just a tad bit big on me ( I have a shorter torso), but not big enough to be a problem.
I should have photographed my bag a bit more. Here it is online. I feel like this video will do a better job of showing off the bag than I could ever do on a blog post (this is my first one). Briefly: the bag doubles as crossbody or clutch (and I've even worn it as a fanny pack). I think I bought it 2-3 years ago... and I still carry it all the time. I'm so glad it's still available because I've been wanting it in lighter colors, maybe the light grey or white?
My sunnies are from Banana but are no longer in stock because they are so old (> 5 years old). My shoes are from eBay and the exact ones I have are no longer available but these are pretty much the same, if you're interested. Good luck.