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See Kai Run Cyrus FlexiRun size guide

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Our tool compares official See Kai Run size charts to find your perfect size. No measuring needed.

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Does the See Kai Run Cyrus FlexiRun run small or large?

Fit guidance comes from our community and the sizes owners report to us. We do not hold any for the See Kai Run Cyrus FlexiRun yet. By adding shoes you own you are helping our community extend the coverage. Add your shoes

See Kai Run has not published a size chart for the See Kai Run Cyrus FlexiRun. What you see above is the brand's general chart, which covers the whole range rather than this model.

Official See Kai Run Size Chart for Cyrus FlexiRun

This chart covers US Big Kids 3 to US Big Kids 4Y, which is feet from 10.2 cm to 22.1 cm long.

This is the official brand-wide See Kai Run size chart. See Kai Run uses the same chart for the See Kai Run Cyrus FlexiRun as for its other models.

Source: the manufacturer's size guide
Fetched 2026-10-23 00:43:27

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Official See Kai Run Size Chart for Cyrus FlexiRun
Foot Length US Big Kids
10.2 - 10.5 cm 3
10.5 - 10.9 cm 3.5
10.9 - 11.3 cm 4
11.3 - 11.7 cm 4.5
11.7 - 12.1 cm 5
12.1 - 12.5 cm 5.5
12.5 - 12.9 cm 6
12.9 - 13.4 cm 6.5
13.4 - 13.8 cm 7
13.8 - 14.2 cm 7.5
14.2 - 14.6 cm 8
14.6 - 15.1 cm 8.5
15.1 - 15.5 cm 9
15.5 - 15.8 cm 9.5
15.8 - 16.2 cm 10
16.2 - 16.6 cm 10.5
16.6 - 17.1 cm 11
17.1 - 17.5 cm 11.5
17.5 - 17.9 cm 12
17.9 - 18.3 cm 12.5
18.3 - 18.7 cm 13
18.7 - 19.1 cm 13.5
19.1 - 19.6 cm 1Y
19.6 - 20.0 cm 1.5Y
20.0 - 20.4 cm 2Y
20.4 - 20.9 cm 2.5Y
20.9 - 21.3 cm 3Y
21.3 - 21.7 cm 3.5Y
21.7 - 22.1 cm 4Y

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

US Big Kids 4 🇺🇸 US Big Kids 5 🇺🇸 US Big Kids 6 🇺🇸 US Big Kids 7 🇺🇸 US Big Kids 8 🇺🇸 US Big Kids 9 🇺🇸 US Big Kids 10 🇺🇸 US Big Kids 11 🇺🇸 US Big Kids 12 🇺🇸 US Big Kids 13 🇺🇸

Frequently Asked Questions

The See Kai Run Cyrus FlexiRun runs true to size, so it matches standard sizing.

Your See Kai Run Cyrus FlexiRun 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 See Kai Run size.

Yes, the See Kai Run Cyrus FlexiRun runs true to size compared to standard See Kai Run sizing. Order your normal size.

Use the size chart above to convert between EU, US and UK sizes for See Kai Run Cyrus FlexiRun. 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: 2026-10-23 00:43:27