By foldable warehouse cage we usually mean the cage itself - foldable, stackable, with upper and lower front doors, and a galvanized surface. Makers mainly offer three standard sizes, A3, A5, and A7, and the parameters are listed below. A3: outer size 800*600*640 mm; inner size 760*570*500 mm; wire diameter 6 mm; mesh 50*50 mm; load 700 kg; volume about 0.22 cubic meters; foot height 100 mm. A5: outer size 1000*800*840 mm; inner size 960*770*700 mm; wire diameter 6 mm; mesh 50*50 mm; load 1000 kg; volume about 0.52 cubic meters; foot height 100 mm. A7: outer size 1200*1000*890 mm; inner size 1160*970*750 mm; wire diameter 6 mm; mesh 50*50 mm; load 1200 kg; volume about 0.84 cubic meters; foot height 100 mm. Note: the source text writes the volume unit as "mm"; it should read cubic meters and is understood as such. Non-standard sizes can be built separately. When selecting, first pick among these three by pallet size and the weight per cage, and go standard where you can.