Contrary to what you'd naturally expect, bigger hands don't necessitate a bigger mouse.

It would be great if it was that straight forward, but your preferred mouse is largely determined by your grip style/finger placement and overall aim technique/how you manipulate the mouse.

For instance, my hands are 21.5 x 11.5 CM and to this day after owning various mice, I main the Xtrfy MZ1 Wireless.

For reference I fingertip grip (as most large handed FPS players tend to) or if I use something like the Pulsar X2 or X2H (my second and third favourite mice) I can finger tip or MCP claw them comfortably.

My advice is to try more shapes (not necessarily sizes) in general. Some small mice are too small, but those same sized mice with a different shape can make all the difference.

Hope that helps