Saddle Panniers made from 1000 denier cordura and nylon web.PANNIER is doubled thickness cordura over seat, Fits on any western saddle ,preferrably 15 inch or greater seat size. Dees on fronts to strap h packor top pack to. Dees on bottom to attach to girth dees. Heavy duty construction with reinforced webbing seams. SM size is 24 inches wide x 16 inches tall x 12 inches deep.Picture shows panniers full ,they dont come expanded they are folded when purchased.