These are an easy slipper that makes up very quickly and is SOOOOO comfy and cute. The sole is made with two strands of worsted weight yarn so they are quite stiff and hold up well. They are also designed to fit your foot - tapered from the big toe to the little toe - this isn't just your ordinary squished oval sole - it is designed to fit your foot! This prevents the slipper from rolling under your foot and twisting around. The stiffness of the sole also keeps it conformed to your foot shape. You'll be sure to get lots of compliments as they warm your feet. Pattern includes ladies US shoe sizes from 5 thru to 12.