Hi Cross!
The size thing is what attracted me to them. I was sized by an
expert and still haven't found comfort. When I tried the size she suggested they hurt. I bought the next size but even that wasn't comfortable. With only three sizes to choose from, instead of an unlimited amount, perhaps I might be able to get a correct fit. Here's hoping! I'll let ya know, if I ever get 'em!!!
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https://www.amazon.com/author/bonnie.mill-lemke
https://kdp.amazon.com/en_US/bookshelf