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The thickness of the board beneath it gives deceptive scale. It's about 50mm tall and the toroid is 85mm in diameter.
https://www.lcsc.com/datasheet/lcsc_datasheet_2408061709_Ruishen-RSCM11548-5mH-3P_C37634003.pdf
I was looking for much smaller CMCs. Also the datasheet for this part doesn't have impedance-versus-frequency graphs so I refuse to buy it anyway :P
A common mode choke is a passive electronic component that functions as a filter, blocking high-frequency noise that is "common" to multiple wires in a circuit while allowing the desired low-frequency signal to pass through, effectively suppressing electromagnetic interference (EMI) from unwanted radio signals or other sources within a system.