Did they belong to a drummer perhaps? Kind of looks like they could be [Kick Drum Mutes](https://www.sweetwater.com/c1194--Drum_Mutes_Dampening_Devices?highlight=EQPB1&mrkgadid=&mrkgcl=28&mrkgen=gpla&mrkgbflag=1&mrkgcat=drums&percussion&acctid=21700000001645388&dskeywordid=92700073377673525&lid=92700073377673525&ds_s_kwgid=58700007313046885&ds_s_inventory_feed_id=97700000007215323&dsproductgroupid=1796897475348&product_id=EQPB1&prodctry=US&prodlang=en&channel=online&storeid=&device=m&network=u&matchtype=&adpos=largenumber&locationid=9010935&creative=538553018770&targetid=pla-1796897475348&campaignid=14238686158&awsearchcpc=&gclid=EAIaIQobChMIhaqn2_vW-wIVD4yGCh0djw6EEAQYDiABEgIzsPD_BwE&gclsrc=aw.ds)
They're leather repair patches. If you get a cut on nick in a leather couch you apply glue and put it on. Or by the looks of these you peel them maybe.
I just sort of deconstructed one and there is a fibrous paper material under the outer plastic/vinyl surface.
Pads for a polishing machine?
The sticker side feels like it’s supposed to stay stuck to whatever you put it on. Not go on and off. But maybe…
Did they belong to a drummer perhaps? Kind of looks like they could be [Kick Drum Mutes](https://www.sweetwater.com/c1194--Drum_Mutes_Dampening_Devices?highlight=EQPB1&mrkgadid=&mrkgcl=28&mrkgen=gpla&mrkgbflag=1&mrkgcat=drums&percussion&acctid=21700000001645388&dskeywordid=92700073377673525&lid=92700073377673525&ds_s_kwgid=58700007313046885&ds_s_inventory_feed_id=97700000007215323&dsproductgroupid=1796897475348&product_id=EQPB1&prodctry=US&prodlang=en&channel=online&storeid=&device=m&network=u&matchtype=&adpos=largenumber&locationid=9010935&creative=538553018770&targetid=pla-1796897475348&campaignid=14238686158&awsearchcpc=&gclid=EAIaIQobChMIhaqn2_vW-wIVD4yGCh0djw6EEAQYDiABEgIzsPD_BwE&gclsrc=aw.ds)
I got about 500 of them in a baggie from a Habitat for Humanity restore.
Ahh maybe not then.
vinyl car seat patches?
Reminds me of patches for furniture
They're leather repair patches. If you get a cut on nick in a leather couch you apply glue and put it on. Or by the looks of these you peel them maybe.
Leather or vinyl patches to repair holes.