Designed and used by working Pros, the One to Six Spot Card is...
Sized for maximum visibility, nine and a half inches square (24 cm) with two and a quarter inch (5.7 cm) diameter spots. These are the maximum sizes for visibility without the prop becoming unwieldy and will play to a 500 seat theater as easily as it does close up in a Zoom show.
Different than the standard "What's Next", which is like a domino, rectangular with a random spot progression. The "One to Six" spot card is square, like a die, and progresses numerically.
Self-centering spots are more difficult to make but worth the trouble. The spots find the right places easily. And since the spots are very thin, less than 0.095", shadow issues are no longer a concern.
The prop is made by us and requires a lot of hand work hence the price. The surfaces of the board and the spots are plastic and easily cleaned with a damp cloth, and a stiff board core brings the prop in at only six ounces.
The Six to One comes with a link to a downloadable tutorial video which includes my personal presentation and easy to follow picture-in-picture instructions. Made in America.