This is one of Knobbles and Bobbles' beautiful Brushed Antique hexagonal shaped knobs.
The diameter of this knob is 40mm (widest points) and the bolt will allow the knob to be fitted to furniture that is 20mm thick. If your furniture is thicker, you will need to purchase a longer bolt. If it is thinner you might need to put something on the bolt to space it, or cut the bolt to length.
Each knob is supplied with the iron head and a bolt.
If you have any questions, please email firstname.lastname@example.org.