Sock Sizing Chart | Find Your Perfect Fit
Altera's alpaca performance socks are designed with a precise, supportive fit that adapts to your foot over time. Use the chart below to find your ideal size.
If you’re between sizes, we recommend sizing down for a more performance-oriented fit, or up for a relaxed, everyday feel.
How Our Socks Fit
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True-to-size with natural stretch
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Targeted compression through the arch for stability
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Alpaca fiber blend molds to your foot after a few wears
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No bunching, slipping, or pressure points
Sizing Tips
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Socks will feel snug at first—this is intentional and ensures long-term comfort
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Alpaca fibers naturally relax and conform with wear
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If you’re between sizes or prefer extra room in the toe box, consider sizing up
Still Not Sure?
If you have questions about fit or sizing, our team is happy to help. Email us anytime and we’ll get you dialed in - sales@alteraalpaca.com.
