I ordered my normal size and it fits well as long as I don't wear a thick sock -  if I wear this with thick socks the fit is very tight across the foot and eventually feet get numb.  So if you want t wear thick socks with these boots I would suggest you order up 1/2 a size.  I have narrow feet and thin calvers and these boots fit perfectly.  if you have a wide foot and muscular calves these boots might not fit you.  I cant tell if the lining is faux sheepskin or the real thing -  I suspect t former.  These boots enclose you foot in a solid stable foot base -  and they have good grips.