Viakix Sizing Guide
Finding your perfect fit is easy! All Viakix footwear runs true to size, but we have specific recommendations based on the style you're choosing. Select your product type below for sizing guidance.
Use the links below to jump directly to the sizing information you need:
↓ Women's Sport Sandals ↓ Women's Hiking Boots & Trail RunnersWomen's Sport Sandals
Fit Overview
Our sport sandals run true to size and fit most foot widths thanks to adjustable straps and flexible webbing materials.
Sizing Recommendation
- Order your regular US shoe size
- Between sizes? Order one size down for the best fit
Women's Size Chart
| You Typically Wear | Order Sandal Size | UK Size | EU Size | CM |
|---|---|---|---|---|
| 6 or 6.5 | 6 | 3.5 | 37 | 24.1 |
| 7 or 7.5 | 7 | 4.5 | 38 | 25 |
| 8 or 8.5 | 8 | 5.5 | 39 | 25.8 |
| 9 or 9.5 | 9 | 6.5 | 40 | 26.6 |
| 10 or 10.5 | 10 | 7.5 | 41 | 27.5 |
| 11 or 11.5 | 11 | 8.5 | 42 | 28.3 |
| 12 or 12.5 | 12 | 9.5 | 43 | 29.2 |
Still Unsure?
Contact our customer care team - we'll help you find your perfect fit. No pressure, no blisters, just the right size for your adventures.
Remember: All Viakix footwear comes with our 30-day comfort guarantee on unworn products.
Women's Hiking Boots & Trail Runners
Monterra & Ridge Rebels: Fit Overview
Length Guidance
The Monterra and Ridge Rebels fit true to size for most customers with a secure heel and natural toe room. We recommend ordering your normal athletic or sneaker size. Available in half sizes for a more precise fit. Most customers do not need to size up, unless they have a wide foot.
Width Guidance
| Foot Width | Recommendation |
|---|---|
| Medium Width Feet | Order your normal size |
| Slightly Wide Feet | Order your normal size |
| Wide Feet (E-width footwear) | The Monterra and Ridge Rebels may feel snug — consider going up ½ size |
| Extra Wide Feet (2E or 3E footwear) | The Monterra and Ridge Rebels will likely feel too snug |
| Very Narrow Feet | These boots may feel too roomy |
Women's Size Chart
| US Size | UK Size | EU Size | CM |
|---|---|---|---|
| 6 | 3.5 | 37 | 24.1 |
| 6.5 | 4 | 37.5 | 24.5 |
| 7 | 4.5 | 38 | 25 |
| 7.5 | 5 | 38.5 | 25.4 |
| 8 | 5.5 | 39 | 25.8 |
| 8.5 | 6 | 39.5 | 26.2 |
| 9 | 6.5 | 40 | 26.6 |
| 9.5 | 7 | 40.5 | 27.1 |
| 10 | 7.5 | 41 | 27.5 |
| 10.5 | 8 | 41.5 | 27.9 |
| 11 | 8.5 | 42 | 28.3 |
| 12 | 9.5 | 43 | 29.2 |
Still Unsure?
Contact our customer care team - we'll help you find your perfect fit. No pressure, no blisters, just the right size for your adventures.
Remember: All Viakix footwear comes with our 30-day comfort guarantee on unworn products.

