This is Knobbles and Bobbles' pair of patterned glazed ceramic mortice knobs. The diameter of these knobs is 6cm, the metal base also has a diameter of 6cm. The knobs are sprung and they are supplied with the metal connecting rod needed to join the knobs through an existing mortice mechanism.
If you have any questions, please contact us at info@knobblesandbobbles.com.