KEEN Men's Jasper Zionic Sneaker size guide

Safari/Sky Captain

Our tool compares official KEEN size charts to find your perfect size. No measuring needed.

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Does the KEEN Men's Jasper Zionic Sneaker run small or large?

Fit guidance comes from our community and the sizes owners report to us. We do not hold any for the KEEN Men's Jasper Zionic Sneaker yet. By adding shoes you own you are helping our community extend the coverage. Add your shoes

KEEN has not published a size chart for the KEEN Men's Jasper Zionic Sneaker. What you see above is the brand's general chart, which covers the whole range rather than this model.

Official KEEN Size Chart for Men's Jasper Zionic Sneaker

This chart covers EU 39.5 to EU 49, which is feet from 0 cm to 32.6 cm long.

This is the official brand-wide KEEN size chart. KEEN uses the same chart for the KEEN Men's Jasper Zionic Sneaker as for its other models.

Source missing — we cannot point to the page this chart was published on.
Fetched 2026-08-22 13:54:35

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UK is not available for this shoe yet, so this is EU.

Official KEEN Size Chart for Men's Jasper Zionic Sneaker
Foot Length EU
0.0 - 24.4 cm 39.5
24.4 - 24.8 cm 40
24.8 - 25.4 cm 40.5
25.4 - 25.7 cm 41
25.7 - 26.0 cm 42
26.0 - 26.7 cm 42.5
26.7 - 27.0 cm 43
27.0 - 27.3 cm 44
27.3 - 27.9 cm 44.5
27.9 - 28.3 cm 45
28.3 - 28.6 cm 46
28.6 - 29.4 cm 47
29.4 - 30.2 cm 47.5
30.2 - 31.0 cm 48
31.0 - 31.8 cm 48.5
31.8 - 32.6 cm 49

KEEN publishes this chart as foot length, so the lengths above are the foot each size fits and we use them as published.

EU 42 🇸🇪 EU 42.5 🇸🇪 EU 43 🇸🇪 EU 44 🇸🇪 EU 44.5 🇸🇪 EU 45 🇸🇪 EU 46 🇸🇪

Frequently Asked Questions

The KEEN Men's Jasper Zionic Sneaker runs true to size, so it matches standard sizing.

Your KEEN Men's Jasper Zionic Sneaker size depends on your foot length and the shoes you currently wear. Use our size finder tool to get a personalized recommendation based on shoes you already own. Alternatively, measure your foot length in cm and use the size chart above to find your KEEN size.

Yes, the KEEN Men's Jasper Zionic Sneaker runs true to size compared to standard KEEN sizing. Order your normal size.

Use the size chart above to convert between EU, US and UK sizes for KEEN Men's Jasper Zionic Sneaker. Each size shows the corresponding foot length in mm so you can see what the charts say.

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What the badges mean

Official

The chart comes from the brand. We read it from a page the brand publishes and we link that page so you can check it.

Model specific chart

The brand publishes this chart for this shoe. Sizes on it apply to the shoe you are looking at.

Brand-wide chart

The brand uses one chart across its range. We show it when the shoe has no chart of its own.

Crowdsourced

Sizes reported by people who own this shoe. The number beside it tells you how many.

Last updated: 2026-08-22 13:54:35