when i measured my tip of my left hand to my wrist it is somewhere between 17-18cm
you should get a medium glove
if you have fat or chubby fingers get the medium.
but for me, measurement is almost the same as yours. but i have “skinnier” fingers. so when i bought the medium, it was too big and loose for my fingers.
i should’ve definitely bought a small, but my mom can sew. so my problem is fixed.
so just a heads up for you.
my fingers aren’t skinny or chubby
Then just get a small it can’t hurt to stretch the glove out a little.