Any form of card-case, beyond the most battered and unassuming, is surely an aesthetic and social travesty. To withdraw, say, a silver case from the pocket before removing a card is surely to trumpet a ludicrous gaucheness and maladroit pretension. It is impossible for the intended recipient of the card to view the case as anything other than a misjudged piece of peacockery; unfeasible to avoid a brief inner commentary along the lines of
Derren Brown