Because the full size cards are not that much use for mobile apps on small screens, here's full deck of half size cards with large numbers. This makes them better for use in applications designed for small screens.
Like the full size cards you will find the cards as a sprite sheet and as individual pngs, with each png containing it's own card. the size of the pngs are 510px x 360 px. The download also includes a folder with each card exported at 100px x 70px because obviously you won't want to be spending hours resizing each png, so you have them in high def and in reduced size.