The problem with shoes is the same with pants:  they can run small and are best bought from a store after trying these on.  I happened to see this model at a local outfitter store for 75 percent off the quoted price here (USD 19.99); a real deal.

These shoes run narrow, though, so I can lace these up as tightly as my other workout shoes.  The balls of both the toes and heels sole are rounded with "balance pods", which creates a challenge for first-time wearers as one feels unstable on flat ground.  One quickly gets used to the sensation and now these are my favorite "toner" shoes for around the school I work at.  They don't "squish" on the floor like my other toners shoes from a different brand do.

The enclosed manual says these shoes are great for walking everywhere.  I disagree.  I don't recommend these on uneven surfaces like gravel or hiking trails, but when well-fitted these are lightweight, everyday walking shoes for the office and other urban surfaces.

These shoes shouldn't cost more than USD 40.  Shop elsewhere if the price is higher.