These are made of sturdy silicone, but are not self-adhesive on their own. They do come with a separate adhesive pad you can use, or get some Tensive gel to help keep them in place
They have built-in pin connections. 40x70 mm.
Sizing note: 25mm=1 inch.
**All pads can be purchased as single sheets or in packs of 3, 5 or 10 at reduced pricing. Larger quantities also available, just ask!