My 26 y.o Brooklyn based son loved the boots I sent, for the style that came with the good engineering for a waterproof boot.  But he has to go through the hassle of a return -- unfortunately the Amazon listed sizings were wrong.  I ordered the US size 9.5-10 (shown as EU size 41), but when the boot arrived it was (yes) EU 41 but (NO!) US size 8.5-9 !!
Grrr.  Correct size is printed on the boot itself.

Tried to do a return for the correct size, only to find that it is not available for exchange, only refund.

Very annoying.