This is Knobbles and Bobbles' beautiful Clear Cut Glass Square Knob. It measure 3.25cm square, it will protrude from your furniture 3.5cm and will fit furniture that is up to 2.5cm thick. Each knob is supplied with the knob itself and metal fixings including bolts and washers. Any questions? Please email email@example.com or ring us on 07746 357625.