RD2 Round 12.5"Our RD2 Round 12. 5" Form is our largest RD2 Round, and is a great size for large dinner plates, or serving trays. WA2 Compatible Stackable with OG Round 14" Form Works with any of our Rim Templates sized 12. 5" or greater Clay should be left on the RD2 forms until stiff, leather hard. Each RD2 Form has a soft rounded edge, 2" spacing from base to rim, and 3 4" depth. All Forms are measured in inches.