The ones with straps around the ankles and insteps are about $70 but should be extra secure and can fit various size boots. Same for the STABILicers. The Korkers Apex is a slip on that "only" costs $40. I plan to check them out with joatmon and/or Dubob and see if they will work for me. But I covet the ones with the velcro straps.
The older I get the more I would rather be considered a good man than a good fisherman.