Vivobarefoot Primus Trail Flow Waterproof – Women’s Barefoot Trail Shoes – Eclipse / Molten Lava

Two ways to measure foot length:

1. Tracing Method:

   • Always trace your foot barefoot.
   • It's important to ask someone else to trace your foot to avoid inaccuracies caused by leaning forward.
   • Stand on a piece of paper, distribute your weight evenly, and have someone trace your foot with a pencil.
   • Draw a line from your heel to your longest toe to determine the length of your foot. Subtract 5mm to account for the thickness of the pencil.

2. Book Technique:

   • Stand on a flat surface with your heel against a straight wall.
   • Place the edge of a book at your longest toe.
   • Carefully step away and mark the edge of the book on the paper.
   • Measure the distance between the mark and the wall. Subtract 5mm for the pencil thickness.

How NOT to Measure

• Always measure barefoot, especially for children.
• Never rely on the shoe's insole to determine whether it will fit; the shoe is always larger than the insole.

How Much Longer Should the Shoe Be?

To allow the foot's muscles to function optimally during movement, shoes should have some "extra space" in length. Remember, the foot's length and width can change throughout the day due to weight-bearing activities. Trying on shoes is crucial, as the extra space depends on the shoe's design, instep height, foot volume, and other factors.

General guidelines for extra length:

• Closed lace-up shoes: Add 9-12mm.
• Slip-on shoes, ballerinas: Add 5mm to prevent the foot from slipping out.
• Sandals or open-toe shoes: Add 0-5mm, as the foot may slide forward without bumping into anything.

How Much Wider Should the Shoe Be?

For width, it's generally recommended to choose a shoe that's 2-5mm wider than your foot to allow the toes to spread comfortably.

Age Considerations

• Children:

  • For toddlers just starting to walk, the shoe should be a maximum of 8mm larger.
  • Up to 3 years old, measure monthly as feet grow quickly; up to 12mm extra is recommended.
  • After 3 years, follow adult guidelines.

• Elderly:

  • For older individuals, consider that their muscle systems are weaker, and their balance may be less stable. Connective tissues loosen with age, so a maximum of 8mm extra is recommended.