This is a listing for x2 stacking thrown pots (you get 2 pots per purchase)
These are less than perfect hence the low price for 2 pots and are for decorative use only. Each listing has one perfect pot and one with a crack that appeared during the glaze firing.
The bigger pots are around 8.5cm and the smaller one that stacks inside around 7cm.
Again be away these are less than perfect and you receive one bigger and one smaller pot for £25.