If size is a concern I suggest you definately go see it in person. I ordered mine off of elux (sight unseen) and I was surprised at how large it was. I have the Zippy and it's about as big as I'm willing to go with a wallet. The Eugenie was substantially larger than the Zippy.The bag I carry the most is my chanel flap - so the size of the wallet is important because there isn't a whole lot of room :O.
I was wondering if the buckle would make the Eugenie bulkier than the pochette wallet and take up more space?