I've been living in this Decjuba denim shirt recently - it's loose but slightly fitted, and goes with everything! Decjuba is one of my favourite shops here in Wellington for versatile, capsule pieces. I have their Sabine vest in about 10 colours! :-)
Here I wore the shirt with black skinny jeans, my fave Beau Coop boots, and gave the outfit a splash of colour with my Shh by Sadie Pineapple and Acapulco necklaces, Sign II bracelet, Paloma Picasso for Tiffany and Co heart ring (I think this was limited edition as we bought it in store in New York and I've never seen it on the Tiffany websites), and my yellow Chanel bag.
What's your current favourite go-to piece?