I have to laugh at the petite female model in the ad pictures for this product. ARE THEY KIDDING? I'm no sylph. I'm in pretty good shape. Fairly average 5'6''-ish female type....at the risk of TMI,19" thigh, 14" calf... and I can practically wrap these around my calf twice. The instructions say to "wrap tightly". HAH! With barely enough velcro catching to hold them together, I can still slip the calf and foot on and off without taking it apart. I undo the thigh section only because it's too stiff to get them on and off otherwise. I honestly thought the measurements listed included extensions, which other models have. If it weren't for the fact that the only other option with similar configuration/options but a smaller size was non-returnable, these would be winging their way back to Amazon.That having been said, they do give pretty good compression, especially on the higher settings, and it's possible that varying the programs will prove useful over the life of the product, though the total leg ones don't really seem much different. Having only used the unit for two days, how much actual good it will do in the long run is not something I feel qualified to speak to, but it does feel pretty good while in progress.I just wish there was a bit more honesty in advertising.