Size:14cm,20cm,25cm,30cm,35cm,45cm,50cm,75cm

14cm outside diameter 14cm, inner diameter 7.5cm, thickness 2.5cm

20cm outside diameter 20cm, inner diameter 11cm, thickness 3cm

25cm outside diameter 25cm, inner diameter 14cm, thickness 3.5cm

30cm outside diameter 30cm, inner diameter 17cm, thickness 4cm

35cm outside diameter 35cm, inner diameter 20cm, thickness 4.5cm
45cm outside diameter 45cm, inner diameter 25cm, thickness 6.5cm

50cm outside diameter 50cm, inner diameter 30cm, thickness 7cm

75cm outside diameter 75cm, inner diameter 45cm, thickness 11cm