16 pc Square TENS Machine, Digital Massager Replacement Electrode Pads 5x5cm or 2"x2" Electrodes are Reusable They wipe clean with a damp cloth. Measurements are: 5 cm by 5 cm or about 2" by 2".Snap Connect diameter is 3.5mm Includes 16 Pads (8 sets). Each set (2 pads) is packaged in a resealable storage bag. These pads can be used for areas of the body that are flat, like back or thighs. They are great quality and come with a thick layer of non-irritating conductive gel that adheres well to your skin, but leaves no sticky residue when the electrodes are removed Thank you and have a wonderful day!