I have a FSA Gossamer Crankset (175mm) and it's standard size double (53/39t0.
It's in perfect condition,they are never used, they were fitted to a bike I bought but I upgraded before taking delivery of the bike so are in perfect condition.
I have photo's I can send if you're interested, looking for £80 for it but open to offers.
I'm selling my Rotor 3D+ 53/39 chain-set. It came with my Focus Izalco pro 1.0. It's been ridden for around 200 miles and feels lovely and stiff. I'm only changing it as I prefer a compact chain set, just personal preference. The chain set is in great condition and I'm happy to upload more photos if requested.