While the Original Correct Toes® toe spacer works to splay and strengthen all of your toes, StableToe® zeroes in on the big toe and arch. It's simple, targeted, and easy to wear inside shoes, making it a great complement to your foot restoration toolkit. Compared with the Original Correct Toes toe spacers, the Stable Toes are a little different: One size fits most, size range includes men's sizes 7-11.5 and women's sizes 8-12. Similar to the original Medium size but the design is more versatile Rounded edges for increased durability 20% softer silicone for increased comfort Improved fit with Left and Right specific design Targeted for big toe alignment From the Correct Toes website: "The #1 Podiatrist Recommended Method for Natural Foot Alignment For 25 years, Correct Toes® has been helping people align, strengthen, and restore their foot health without surgery or invasive treatments, curing the most common foot conditions: Invented by Dr. Ray McClanahan, DPM, Correct Toes® are a device made from flexible, medical grade silicone designed to encourage your toes back into their natural alignment. "Relieve foot pain while being active "Align toes to their natural position "Improve strength of the toes and foot "Increase circulation to the ends of the toes "Enhance balance and stability"