SALE 2 PIESE MULTIPLE OF DECORATIVE BORDER EDGING CONCRETE MOLD
OUTER CIRCLE DІAMETR 47.2 inch , 1200 mm INNER CIRCLE DIAMETER 36.85 inch 936 mm 4.33 INCHES TALL, 5.19 INCHES THICK 110 mm TALL, 132 mm THICK 
For a circle you need 8 segments 
The mold is made of ABS plastic thickness of 0.078" (1.9-2 мм)