These took about 4 hours each, give or take. These particular designs are sprites from a game. I just recolored them using my bead pallet color on photoshop and then I have a program that cuts them into 27x27 squares with the color code needed. Other designs I've done have been done more from scratch.
I learned to only iron one side. I bead it the opposite of what I want the final project to look like. Then I iron the one side quite a bit (almost flat) and it keeps the project flat and flexible but still strong =]