Textured ceramic planters in 'Petrol' available in 5 sizes:
 
Dimensions (approx):
7cm external width, takes a 6cm plant pot
10cm external width, takes a 8.5cm plant pot
12cm external width, takes a 10.5cm plant pot
14cm external width, takes a 11.5cm plant pot
16cm external width, takes a 13cm plant pot