1 Final HD (1920x1080) thumbnail, along 2 slight variations for you to A/B test and see which one is performing the best.

The idea I research and sketch out some ideas, after that I'll send a final sketch along notes for you to understand the concept thoroughly

Concept we can discuss ideas, refine the sketch and come to the final agreement of how we want the thumbnail to be like

Design After we have decided the concept, I'll go ahead and design the final thumbnail and send it over to you

Feedback and Upload Refine and revise if it's not satisfactory, otherwise we're good to go!