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 Digital Massagers with leads that connect to 3.5 snap pads. Feel free to message me through eCRATER Messaging if you have questions on compatibility. Thank you and have a wonderful day!