On Cloud 5 Size Guide: Finding the Perfect Fit for Comfort and Performance

The On Cloud 5 is one of the most popular models from Swiss running brand On, known for its lightweight construction, everyday comfort, and signature CloudTec® cushioning. Whether you’re using it for daily walks, casual runs, or urban commuting, getting the right size is crucial for maximizing comfort and performance. This size guide will walk you through everything you need to know about the On Cloud 5 fit, sizing tips, and how to ensure you’re getting the perfect pair.


Understanding On Cloud 5 Sizing

The On Cloud 5 fits true to size for most users. However, a few key details can help you fine-tune your sizing decision based on your foot shape, width, and intended use.

General Fit:

  • Length: True to size
  • Width: Standard (medium), with a snug midfoot
  • Arch: Moderate arch support
  • Toe Box: Slightly narrow; may feel snug for wider feet

On Cloud 5 Sizing for Men and Women

On offers gender-specific fits in the Cloud 5 to better align with anatomical differences:

Men’s Sizes:

  • Available in US 7 to US 14
  • Standard width (D)
  • Half sizes available

Women’s Sizes:

  • Available in US 5 to US 11
  • Standard width (B)
  • Half sizes available

If you have wide feet, consider sizing up by half a size or exploring the Cloud 5 Wide version, which is specifically built for broader foot shapes.


Signs You’ve Got the Right Fit

To ensure your On Cloud 5 fits properly:

  • You should have about a thumb’s width of space between your longest toe and the front of the shoe.
  • The heel should feel secure with no slipping.
  • The midfoot should feel snug but not tight.
  • Your toes should be able to splay slightly without being cramped.

Tips for Measuring Your Feet Accurately

If you’re ordering online, here’s how to measure your foot to find the best size:

  1. Stand on a piece of paper and trace your foot.
  2. Measure the length from the heel to the longest toe.
  3. Use On’s official size chart to convert the length in inches or centimeters to your US/EU size.
  4. Measure both feet—go with the larger foot if there’s a difference.

On Cloud 5 Wide vs Regular Fit

If you’ve tried the standard Cloud 5 and felt the midfoot or toe box was too tight, On offers a Cloud 5 Wide model that provides:

  • More space in the forefoot
  • Increased upper flexibility
  • A roomier fit for high-volume feet

This is ideal for runners or walkers with wide feet, bunions, or those who prefer a more relaxed fit.


Half Sizes and Break-In Period

The On Cloud 5 comes in half sizes, which helps fine-tune the fit. If you’re between sizes or plan to wear thicker socks, go up half a size. Although the Cloud 5 doesn’t have a long break-in period, it may feel slightly snug during the first few wears as the upper material adapts to your foot.


Common Fit Concerns

ConcernRecommendation
Narrow toe boxTry Cloud 5 Wide or go half-size up
Heel slippingEnsure laces are snug; try runner’s knot
Arch feels unsupportedUse aftermarket insoles for extra support
Too tight across midfootConsider Cloud 5 Wide or loosen lacing

Final Thoughts

Finding the perfect fit in the On Cloud 5 ensures that you can enjoy its full benefits—lightweight construction, soft landings, and all-day comfort. Most people will find their usual size fits well, but wide-footed individuals may benefit from the Cloud 5 Wide or sizing up slightly.

If comfort and performance are what you’re after, paying attention to sizing is a small but crucial step toward getting the most out of your shoes.