Hi Mary. Both are good

Hi Mary, Both options are grammatically correct, but the choice between them depends on the specific context and the emphasis you want to place. If your intention is to highlight that it is an artistic representation, go with "Playing Card Sketch: Jack of Diamonds." If you want to emphasize that it is a design draft for a playing card, choose "Sketch for a Playing Card: Jack of Diamonds."

Gamarjoba! Yes, both are correct 🎨✍🏼