I have very muscular calves and have a difficult time finding boots to fit my 16 3/4" + calves and these are perfect!!! in fact after wearing them several times they've stretched out enough where I have to pull them up!  They fit comfortably with boot socks and skinny jeans/jeggings. I love them so much I'm planning on getting a pair in black.  I've had multiple pairs of fur lined boots including a different pair of Ugg brand and hands down it's worth the extra money to get the Ugg brand.