Here's a picture of the floor of the Square Root Restaurant in Brevard NC: https://www.tripadvisor.com/LocationPhotoDirectLink-g48979-d829359-i63730317-The_Squ

Here's a picture of the floor of the Square Root Restaurant in Brevard NC: https://www.tripadvisor.com/LocationPhotoDirectLink-g48979-d829359-i63730317-The_Square_Root-Brevard_North_Carolina.html https://www.tripadvisor.com/LocationPhotoDirectLink-g48979-d... Each block is 6"x6" (15cm x 15cm) of pine. Apparently it lasts a long time, but took a long time to install.