These XL (X-Large) WIDE Massage Pads are flexible pads, that are durable, and feature a thick layer of non-irritating conductive gel of which adheres nicely to your skin,but leaves no sticky residue with removal. Description: Massage Pads are Reusable Wipe clean with a damp cloth. 2.0 mm to 2.5 mm thick. Measurements are: 3.54" (9 cm) length by 2.36" (6 cm) wide. Snap pin diameter on the Pad measures 3.5 mm. Set includes 8 Pads (4 sets). Each set is packaged in a resealable storage bag These high-quality pads are compatible with many brand name massagers on the market with leads that connect to the 3.5mm pin snaps on the pad. Feel free to message me if you have questions on compatibility. Thank you and have a wonderful day!