Can Leitner leatherette earpads fit Plantronics headsets?

For corded headsets:

It properly fits the HW251 and HW261 headsets[BOTH DISCONTINUED]. Everything else is the wrong size.

For wireless headsets:

It *barely* fits the CS510 / CS520 and W710 / W720 headsets, but it’s a TIGHT squeeze and it doesn't look quite right.

So now you know!