560 Clear Sticky Tack Adhesive Poster Tacky Putty Removable Round Putty Double-Sided Round No Traces Adhesive Sticke for Festival Decoration 20mm/0.78 inch

These are exactly what I was looking for. It's been some years since I wanted to hang any posters, but I did have a need for something thin that is sticky on both sides to hold down a piece of self-grip shelf liner I use on a side section of a lap table used to hold my notebook. There's enough room to use one side of the table for my cell, but the table has a higher back than front, the way I use it, and when placing the unit on a table or floor when not in use, the strip of self-grip shelf liner would slide off. Without my legs under the unit, the angle was more steep. These little dots solved that problem perfectly. They are thin enough they aren't even felt through the self-grip shelf liner, and they grip it strongly enough that it stays in place. The glue used is strong enough. I'm pleased with the result.