California Oak 6x8 #6818 by Motawi. Nawal Motawi collaborated with Artist Yoshiko Yamamoto to bring her bold block prints to life in clay for this design inspired by the rolling hills of California's Central Coast. Each art tile is handmade with heart in Ann Arbor, Michigan. Tiles are 5/8" thick and feature a notch at the back for hanging. They also look great in a custom frame.