All Kinesis camera straps and harnesses use 10mm (3/8") wide webbing which fit into a slotted lug found on many cameras. Some cameras or binoculars have a round lug instead, in which case you will need these O-rings as an adapter.
To prevent the ring from scratching the finish, consider the Foto&Tech Leather Cover Pad+Lug Ring Hook instead of just the O-Rings.
14mm (.55") I.D.