rabbi kippah black Terylene

What it’s Rabbi kippah? And why is it called so?

This kippah is Named after great rabbis from all over the world would that wear it.
The main reason for the special shape of the kippah is that in the past the rabbis used to wear tefillin all day and when they left the beit midrash they covered the tefillin with the big kippah.
Plus the kippah covers most of the head.
Today, there are not many rabbis who wear this kippah, but there are many rabbis who wear this kippah at home during studies.
This product is now also popular as a Purim costume of a rabbi.

Rabbi shach wore such a kippah.

The photo was taken from Twitter: Jesse Horn

The dimensions correspond to the dimensions of the black hats:
Size 4 – Cap 54
Size 5 – Cap 55
Size 6  – Cap 56
Size 7 – Cap 57
Size 8 – Cap 58
Size 9 – Cap 59
Size 10 – Cap 60