iPhone Wrist Strap Mixed Beads Apple Checkered Cube

Yes, the iPhone Wrist Strap Mixed Beads Apple Checkered Cube fits all iPhone models: it attaches to a case with an attachment point (eyelet, loop or ring), as described on this page.

The top ends in a thin white thread, to be passed through a case's eyelet, like a keyring. The photos show neither a tether tab nor a carabiner.

Yes, because no tether tab is visible in the photos: the wrist strap fixes to a case eyelet, and without an eyelet it has no attachment point.

The length is fixed and no measurement is given. In the photos, it is a loop of beads hanging from the thread, with no slider or adjustment.

No, nothing suggests it does: these are small beads strung on a fine thread, designed more as a hand grip. Avoid letting the iPhone hang from the thread alone.

It forms a loop of beads attached to the top of the iPhone: you can grab it or slip your fingers through it. As the exact length is not given, it works as a hand grip rather than a crossbody strap.

Wipe them with a soft, slightly damp cloth, then leave them to air dry. Avoid immersion and harsh cleaning products.

Yes, avoid immersion: the beads are strung on a fine thread and some look painted. Wipe them after a splash.

A red apple-shaped bead, a blue checkered cube, a small red patterned cube, clear beads of various shapes and red and blue seed beads.