You need to be verified first. After that a card takes under a minute.

Choose Issue card in the sidebar, pick Visa or Mastercard, and set how much of your balance to load onto it. Each card's brand, BIN and issuing country are shown before you issue it, so if a merchant has refused one card, a different one is worth trying.

The fee is shown before you confirm and comes out of your wallet on top of the amount you are loading. The card number, expiry and security code are available immediately afterwards under My cards, where you can also give the card a name so you can tell it apart later.

How many cards you can hold at once is shown on that page. Closing one frees its slot straight away.