If you don't like Blue, Green and Yellow - you're out o'luck. And yes: they are bright, I mean BRIGHT!
They are about 12 " square - probably meant to be 12 1/2", but remember this is my very first project and 1/4 inch didn't mean anything to me...I got a total of 12 different blocks.
V, if you think you could cut tilted (?) or wonky 10 1/2" blocks out of them or if you want me to do it: they are yours. Maybe you have an even better way of using them? Obviously if you hate them and don't see any use for them, I understand. What can I say: they are "special" in color and chosen pattern.
Please let me know in my comments!