Based on Images salvaged from the Sunset and shutdown Android CCG Valkarie Crusade

It will make good looking cards and I recommend giving a square resolution or one for playing cards listed below

1. Low Resolution (for web or small displays):

   • 250 x 350 pixels

   • 300 x 420 pixels

2. Medium Resolution (for standard digital use):

   • 500 x 700 pixels

   • 600 x 840 pixels

3. High Resolution (for printing or high-definition displays):

   • 750 x 1050 pixels

   • 825 x 1155 pixels

4. Ultra High Resolution (for large prints or detailed artwork):

   • 1000 x 1400 pixels

   • 1200 x 1680 pixels