A corner fillet (16) for the securing together of two mutually perpendicular panels (10,11) of an article of furniture is securable by fastening means to each of the panels independently. In an article of furniture having panels joined by such corner fillets (16) the fastening means are offset relative to each other from one corner fillet to the next thereby to ensure that the panels and corner fillets can only be assembled in one predetermined configuration. The fillets (16) preferably have rebates (18) along each external edge bordering the adjacent panels.
