Irregular Round Blate Pottery Form 28cm28. 5cm diameter (3. 2cm thick) irregular round blate (bowl deep plate) pottery mould with roundover edge. This is the largest size in our new Irregular Round Form collection. The small and medium sizes nest within the large. Don't forget to add on the screw in Base Handle which can be purchased separately here. Or get the Irregular Round Blate Bundle to grab all three forms with a Base Handle for a discount. Fin Pottery Tools pottery forms are