The shoes are approximately size 5 to size 5.5. Product Dimensions: 9.5 x 4 x 0.5 inches

Women shoe size:
    US 5 = Euro 35~36 = 8.5; = 21.6cm;
    US 5.5 = Euro 36 = 8.75; = 22.2cm;
    US 6 = Euro 36~37 = 8.875; = 22.5cm;
    US 6.5 = Euro 37 = 9.0625; = 23cm;
    US 7 = Euro 37~38 = 9.25; = 23.5cm;
    US 7.5 = Euro 38 = 9.375; = 23.8cm;
    US 8 = Euro 38~39 = 9.5; = 24.1cm;
    US 8.5 = Euro 39 = 9.6875; = 24.6cm;
    US 9 = Euro 39~40 = 9.875; = 25.1cm;
    US 9.5 = Euro 40 = 10; = 25.4cm;
    US 10 = Euro 40~41 = 10.1875; = 25.9cm;
    
Because the foot is three-dimensional, any two-dimensional measuring tool, such as a ruler or Bannok device, can only approximate your true shoe size. Please also keep in mind the manufacturers use different lasts to construct their shoes, and sizing may vary accordingly.