I originally ordered the regular calf and I literally could not get my foot into the boot.  The extended calf was a tad tight for me in the calf, initially, but after wearing them 4x, they've slightly stretched out and now they are perfect.  I have disproportionately skinny ankles (to the rest of my leg) so I was a bit worried about baggy ankles, but I didn't seem to have that problem.

Love the boots - well made, sturdy and fashionable.  I think they run a tad big - I am a true 5.5 and I could've gone for a size 5 as far as the length of the base of the boot.