SPST 4.2x3.2mm

ReferencePackageValueQuantityRatingNote
SW1014.2x3.2 (PTS810)Switch SPST1

This is the same switch used on the Raspberry Pi Pico board. Any similar switch is fine.

Example:

SPST 3.3x3.3mm, 1.5mmH

ReferencePackageValueQuantityRatingNote
SW102, SW103, SW1043.3x3.3x1.5HSwitch SPST 250gf3250gf activation force

3.3mmx3.3mm switch, 1.5mm total height, 250gf activation force. Any manufacturer.

Example: