European Sizing:

• 36 = US 6
• 36.5 = US 6.5
• 37 = US 7
• 38 = US 7.5
• 38.5  = US 8
• 39 = US 8.5  
• 40 = US 9
• 40.5 = US 9.5
• 41 = US 10

Women's Slipper Sizing:

• Small = 5- 7.5
• Medium = 7.5 - 9
• Large = 9 - 10.5
• X-Large = 10.5 - 13

Children's Slipper Sizing:

• X-Small = Up to 4
• Small = 5 - 7
• Medium = 8 - 10 
• Large = 11 - 13 
• X-Large = 1 - 3

Men's Slipper Sizing:

• Small = 7.5  - 8.5
• Medium = 9 - 10 
• Large = 10.5 - 11.5 
• X-Large = 12 - 13

Children's Goody-Goody Shoe Sizing:

• Small = 0-6 Mos.
• Medium = 6-12 Mos .
• Large = 12-18 Mos.
• X-Large = 18-24 Mos.