The largest of our OG Spherical Rectangle Forms, the OG Spherical Rectangle 8x15" is a perfect size for platters and serving trays. 
 
The OG Spherical Rectangle 8x15" is also stackable with our OG Spherical Rectangle 6.5x13.5" Form, which allows for greater depth and versatility. 
 
Clay should be left on the OG forms until stiff, leather-hard. 
 
Each OG Form has a 45 degree angle edge, and 3/4" depth.
 
All Forms are measured in inches.