These boots are great and very cool but the lower calf and ankle area have no give at all.  Its confusing as I saw a video on the web with a heavy woman with thick calves showing them off so I don't know how she got them on.  They do have stretch in the upper calf via side panels but none in the lower shaft.
If you don't have slender calves might want to find other boots, but they were very cool looking boots and nicely made.  Find a shop that has these and try them on before ordering.