Undoing a button or two instantly dials back the formality of any outfit. If you decide on such a (slightly rakish) choice with your shirt, the strength of Trillian's simple but classic design in your suit pocket will perfectly counterbalance any potential, stilistic overstep.
I bought several pocket squares from Tieroom - the shipping and delivery were very quick: I had them in my mailbox (in Vienna) after just three days. Nicely packaged, fantastic quality, great fabric, rich and very clear colors and the handkerchiefs are just the right size - in short, I am very, very happy with my purchase! Absolutely recommend it!
