Just place these in your workshop, on the kitchen counter, office or closet ect. For easy dispensing of the batteries. You get the D battery holder and the C battery holder together as a set. The D battery holder holds 6 D batteries. It is 8 x 2.75 x 1.6 inches. The C battery holder holds 8 C batteries. It is 8 x 2.25 x 1.4 inches. These are 3D printed with PLA. PLA is a form of plastic used in 3D printers to make all kinds of stuff.