Last at a glance
- Sets
- Width, volume, toe shape, heel cup
- Why sizes differ
- Every brand has its own
- Volume
- Low, medium or high
What a last decides
Every shoe starts as a solid form roughly the shape of a foot, and the upper is stretched and stitched around it. That form is the last. It's the reason a size 10 in one brand swims on you while a size 10 in another crushes your little toe.
Why brands fit consistently within themselves
Brands are fairly consistent within themselves, which is the useful part. If a maker's last has worked for your foot before, its other models are a decent bet. This is why experienced hikers talk about brands rather than models when they give footwear advice, and why finding the brand whose last matches your foot, then staying with it, saves more grief than any amount of model research.
Low, medium and high volume
Lasts get described as low, medium or high volume, which is about the space between the footbed and the top of the shoe rather than length or width. A high-volume foot in a low-volume last gets pressure across the top of the arch no amount of lacing will fix.
What this means when you're choosing
- Whether the brand publishes a volume or width description for the model
- Wide fittings, which are a genuinely different last on some brands and just a roomier upper on others
- Consistency: if one model from a brand fit, start there rather than starting over
The common mistake
Treating size as portable between brands
Shoe size is a length in principle and a brand's opinion in practice. Ordering your usual number from a maker you've never worn is a coin flip, which is what makes buying footwear from a retailer with free returns worth more than the discount you'd get elsewhere.
Common questions
Why does the same size fit differently between brands?
Because they're built on different lasts. There's no cross-brand standard that governs width, instep height or toe shape, so the number on the box only ever approximates length, and even that drifts.
Can I stretch a boot that's built on the wrong last?
A cobbler can gain you a little width in a leather upper, and that's genuinely useful for a single pressure point. What you can't change is the volume or the shape of the heel cup, so if the whole shoe is wrong the fix is a different boot.