RD2 Round 6.5"Our RD2 Round 6. 5" Form is our smallest RD2 Round, and is a great size for tapas plates, or bread plates. WA2 Compatible Stackable with OG Round 8" Form Works with any of our Rim Templates 7. 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.