SparkFun's Qwiic Connect Standard uses a 4-pin JST connector to quickly interface 3.3V I2C development boards with sensors, LCDs, relays and more.
Adafruit use the same Qwiic standard, but call their connectors and cables, Stemma QT
Qwiic JST Connector - SMD - 4-Pin
Here is a tiny 4-pin Qwiic 1mm JST connector. This connector is used on all of the Qwiic-based boards and can be used to create your own I2C-based device compatible ..