SIGVARIS strives to ensure that our products fit properly. Our newest sizing chart combines the latest data from advanced population measurement studies for an overall improved fit, while providing comfort and convenience. SIGVARIS puts patients first with efficacy standards that guarantee accurate compression levels. The new sizing system will still offer those that wear SIGVARIS products two lengths for each ankle size. There are no changes to the ankle circumferences; and, like the original PFS System, the new sizing system guarantees the graduated compression level as stated on each product box. This new sizing system has already proven successful with our Soft Opaque product line, which follows the same sizing system. SIGVARIS products containing the new sizing system are easily identified with new packaging as shown below. Always check the back of the box to identify the correct sizing system.