Altra Shoe Size Chart: US, UK, EU & Foot Length Guide (Men & Women)

Altra Men’s Shoe Size Chart (US, UK, EU, CM)

This is Altra’s men’s chart from US 4 to 16. Altra labels its shoes in US sizes, so order by the US column. The CM column is Altra’s centimeter size, and the brand says it is the most accurate guide if you measure your foot in centimeters.

Source: Altra men’s size chart, US 4 to 16.

Altra Women’s Shoe Size Chart (US, UK, EU, CM)

This is Altra’s women’s chart from US 4 to 13. Altra skips US 12.5 in the women’s range, so the next size after 12 is 13. For the general men’s and women’s rule, see our men’s to women’s conversion chart.

Source: Altra women’s size chart, US 4 to 13.

How to Measure Your Foot for Altra

Altra’s steps are simple: stand on a sheet of paper with your heel against a wall, mark the tip of your longest toe (it may not be your big toe), and measure from the wall to the mark in centimeters. Match the result to the CM column, then leave about 1 to 1.5 cm of room at the front of the shoe, as Altra recommends. Measure both feet and use the longer one. Our how to measure foot size at home guide covers the same steps with photos.

Do Altra Shoes Run True to Size?

Altra says its shoes are generally true to size in length, and its width is also true to size. The wider toe box is intentional, to allow natural toe splay, so extra space around the toes is normal. Altra adds that fit varies by model: some runners find older Escalante versions a little narrow, while Torin and Lone Peak are described as generally true to size. If you are moving from casual sneakers into running shoes, Altra suggests you may want a half or full size up for foot swelling. A wide toe box is not the same as a wide fit, so if you have wide feet look at Altra’s Wide models (2E for men, D for women). See our shoe width guide for how width letters work.

Altra Fit Types: Original, Standard, Racing and Wide

Altra describes four fits. Original has the most room and the highest volume for toe splay. Standard is the most common fit, with a secure midfoot and room in the forefoot. Racing keeps room for the toes with a snug midfoot and is used in its carbon racers. Wide adds room through the midfoot and forefoot. Check which fit your model uses on its product page, because the same size can feel different across fits.

Men’s vs Women’s Altra Sizes

On Altra’s chart, a men’s size is 1.5 above the women’s size on the same foot length: men’s US 9 and women’s US 10.5 are both 27 cm. UK and EU numbers differ between the two tables, so convert using the table for the section you are buying from rather than adding or subtracting a rule.

Comparing Altra With Other Brands

Altra’s wide toe box means a size from another brand will not always feel the same. If you also wear HOKA, Brooks, Saucony or New Balance, start from your measured foot length and read across to Altra’s chart. For more on the running category, see our running shoe statistics.

Frequently Asked Questions About Altra Shoe Sizes

Final Takeaway

Altra’s chart is straightforward: US sizes, a CM column and a deliberately roomy toe box. Measure your longer foot, leave 1 to 1.5 cm at the front, and check the fit type on the model page before you order.

More Shoe Size Guides

Sources

• Altra size chart
• Altra: Do Altra shoes run true to size?