Even more remarkable, “only a few millimetres in diameter”.
Indeed... A millimeter is 1/32 of an inch... So “a few millimeters is just over a 16th and with a Polish!?? 2000 years ago!?? Ya that’s something to be impressed over!
Probably a lot of things dropped out of settings when people were in the baths...big, small, whatever. It’s very interesting to see that their lives in this respect were similar to those of anybody who goes to their local or hotel gym w. sauna, LOL!
One of the things that has always irritated me, btw, is that the Muslims get credit for the baths in Spain...but the Romans had been doing this long before the Islamic invasion until which time Spain had been the most important Roman colony, the birthplace of emperors, scholars and even playwrights, both in pagan and Christian times...and now nobody recognizes this.