These plates are New old stock, produced by Luminarc/Mikasa. They are 7" X 7 1/4" in size, and there are 4 in the set.

The designs are:
Spare Maidens (salmon color plate)
Fire Balls (yellow plate)
Lucky Strikes (turquoise plate)
King Pins (orange plate)

These make a great gift - be sure to order more than one set so you have enough to go around!
Be sure to check out the matching tumbler glassware, too!