Solid Orange Ankle Sock - Wool/Nylon (Yarn from UK) Medium Weight YarnSock Sizing: Adult Women's Sizing (For Men go up 1 Size larger)XS - US 3/4 Shoe (8" Foot)S - US 5/6 Shoe (8.5" Foot)M - US 7/8 Shoe (9.25" Foot)L - US 9/10 Shoe (9.75" Foot)XL - US 11/12 (10.25" Foot)Since this is not done by a machine, please allow 1/4" difference.Custom SIzes Available. Please email me for requests. firstname.lastname@example.orgMeasurements using measuring tape:Foot - Back of Heel to end of longest toe. Measure on a flat Surface.Width - Measure largest area around foot just below the toes. Cuff - This part shows sticking out of a shoe. Ankle to Calf length.Measurements of actual sock may be a little smaller for fit.Sock Weights: Light Weight, Fingering Sock Yarn, Fits in Most ShoesMedium Weight - Heavier but not the heaviest, Sport or DK Yarn, Fits in most Roomy Shoes such as Crocks or Day Hike ShoeHeavy Weight - Heavy Weight - Boot Sock or House SockSuggested Washing Instructions:Wash in Cold, Gentle Cycle of Washing Machine or Hand Wash with minimal agitation.Blot Excess Water or Squeeze Gently to remove excess water. Line Dry or Lay Flat to Dry. Do not Wring. Mold in the shape you want it to dry intoPerformance:These are casual socks and not made for heavy excercise. Performance Socks usually have performance fibers made for certain sports. All my handknit socks have a smooth foot for shoe wear. They are made specifically for casual shoes and activities.I would love feedback on your purchases for influencing my future yarn choices.