I measured the widest part of the calf when I put on the pants that I want to wear sitting and standing (sitting: 14.25, standing 16.5) and she expected to be snug. Stretch means they fit perfectly and are not tight at all. I bought these to be durable "shoe covers" replacing fashion/suit to mimic knee high boots. The strap that goes underneath is a bit noticeable when standing up (they are DESIGNED for riding so I don't see that as a downside) but this may not be the case with slightly higher heeled boots. For the record, the boots I wear them with are combat boots with 1 inch heels.
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