9.35×5.63 mm. 2020-0104A-2
Washed up on shell sand at low tide, This species is very locally common at East end of Spirits Bay, but fresh shells are hard to get.
Also, the shell sand that is including many micromolluscs only appear at low tide.
Same data as these observations:
https://www.inaturalist.org/observations/37741430
https://www.inaturalist.org/observations/37741431