1.25mm Pitch 4-pin Cable Matching Pair - 40cm long - Molex PicoBlade Compatible
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When 0.1" is too big, and JST PH's too chunky, these ultra-slim 1.25mm connectors are a reliable alternative. These are only 1.25mm pitch, but have a nice clicky connection.
These cables are nice and long, 40cm in fact. They've got both small form factor and are a matching set, with an inline socket and plug connector. The two friction lock to make easy-breezy connections whenever you need light and small connectivity.