you don't need one
you need 3 cards with you max
carry notes in the same pocket
change in the back pocket
wallets are rubbish and they don't even look swish cos everyone has one these days whereas i just get my debit card out my pocket without even trying and i look super cool
also I don't have to deal with the really annoying bulge of in my pocket. JUST THE MASSIVE ONE IN MY PANTS EH?