Black Friday - best deals from 50 stores Good news from Altra shoes:
- Their sizes are mostly consistent with other running shoe brands
- They have some of the widest toeboxes in the running shoe industry
When trying your first pair of Altras, prepare to experience significantly more space in the toes than what you’re accustomed to. It may seem like the shoe runs big, so it’s important to take into account your foot length.
If there is about a thumbnail’s width space between the longest toe and the upper, the size is just right.
To increase your chances of getting an accurate Altra size, we recommend measuring your foot length and checking it with the chart below.
Tip: If you fall in between sizes, go with the bigger one.
Altra men's and women's size chart
Altra FootShape: the widest toebox among running shoes
Altra’s roomy design is meant to accommodate all of your digits and let them splay freely. Although the toebox volume varies from one shoe to another, overall, Altra shoes tend to be quite roomy.
Currently, there are three types of Altra FootShapes:
- Original Fit (the widest)
- Standard Fit (still wider than average)
- Slim Fit (more like average or slightly roomier)
Standard is by far the most common shape but there are quite a few shoes with the Original fit too (Lone Peak, Olympus, Escalante) is best for people who enjoy a roomy toebox and love to be able to wiggle their toes. Meanwhile, shoes with a Slim fit are a minority - these include race and speed-oriented shoes.
Dive into our detailed lab reviews to find out which Altra shoe has which fit shape. We also measure the toebox dimensions and the internal heel-to-toe length of each shoe to help you find the best-fitting option.
How Altra shoe sizes compare to other brands
Chances are high that you will need the same shoe size in Altra as you normally have in your running shoes. Especially if you’re coming from such brands as Hoka, Brooks, New Balance, or ASICS.
| Foot length (mm) | Altra | Hoka | Brooks | New Balance | ASICS |
| Men's US sizes | |||||
| 270 | 9 | 9 | 9 | 9 | 9 |
| 280 | 10 | 10 | 10 | 10 | 10 |
| 290 | 11 | 11 | 11 | 11 | 11.5 |
| Women's US sizes | |||||
| 230 | 6.5 | 6 | 6 | 6 | 6 |
| 240 | 7.5 | 7 | 7 | 7 | 7 |
| 250 | 8.5 | 8 | 8 | 8 | 8 |
To compare Altra sizes with other brands, go to the conversion tool at the bottom of the page. Input the size and brand that fits you well to find out its equivalent in Altra.
