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Sidi ASPER size guide

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

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Sidi Asper Laces MTB (Unisex)
Tredz Sidi Asper Laces MTB (Unisex)
114.00 GBP
Sidi Asper MTB (Unisex)
Tredz Sidi Asper MTB (Unisex)
139.00 GBP

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Foot measurement
Measure your foot length in millimetres
mm
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Does the Sidi ASPER run small or large?

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

Sidi publishes a chart for the Sidi ASPER, and it runs about 2 sizes larger than Sidi's general chart. For the same foot, this model asks for a smaller size than Sidi usually does.

Official Sidi Size Chart for ASPER

This chart covers EU 36 to EU 50, which is feet from 22.2 cm to 31.8 cm long.

This is a model-specific size chart. Sidi publishes this chart specifically for the Sidi ASPER.

Source: the manufacturer's size guide
Fetched 2026-10-17 17:50:05

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Official Sidi Size Chart for ASPER
Foot Length UK EU US
22.2 - 22.5 cm 3 36 4
22.5 - 22.8 cm 3.5 36.5 4.5
22.8 - 23.2 cm 4 37 5
23.2 - 23.5 cm 4.5 37.5 5.5
23.5 - 23.8 cm 5 38 6
23.8 - 24.2 cm - 38.5 -
23.8 - 24.5 cm 5.5 - 6.5
24.2 - 24.5 cm - 39 -
24.5 - 24.8 cm 6 39.5 7
24.8 - 25.2 cm 6.5 40 7.5
25.2 - 25.5 cm - 40.5 -
25.2 - 25.8 cm 7 - 8
25.5 - 25.8 cm - 41 -
25.8 - 26.2 cm 7.5 41.5 8.5
26.2 - 26.5 cm 8 42 9
26.5 - 26.8 cm 8.5 42.5 9.5
26.8 - 27.2 cm 9 43 10
27.2 - 27.5 cm - 43.5 -
27.2 - 27.8 cm 9.5 - 10.5
27.5 - 27.8 cm - 44 -
27.8 - 28.2 cm - 44.5 11
27.8 - 28.5 cm 10.5 - -
28.2 - 28.5 cm - 45 11.5
28.5 - 28.8 cm - 45.5 -
28.5 - 29.2 cm 11 - 12
28.8 - 29.2 cm - 46 -
29.2 - 29.5 cm 11.5 46.5 12.5
29.5 - 29.8 cm 12 47 13
29.8 - 30.2 cm - 47.5 -
29.8 - 30.5 cm 12.5 - 13.5
30.2 - 30.5 cm - 48 -
30.5 - 30.8 cm 13 48.5 14
30.8 - 31.2 cm 13.5 49 14.5
31.2 - 31.5 cm - 49.5 -
31.2 - 31.8 cm 14 - 15
31.5 - 31.8 cm - 50 -

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

EU 36 🇮🇹 EU 37 🇮🇹 EU 38 🇮🇹 EU 39 🇮🇹 EU 40 🇮🇹 EU 40.5 🇮🇹 EU 41 🇮🇹 EU 41.5 🇮🇹 EU 42 🇮🇹 EU 42.5 🇮🇹 EU 43 🇮🇹 EU 43.5 🇮🇹 EU 44 🇮🇹 EU 44.5 🇮🇹 EU 45 🇮🇹 EU 46 🇮🇹 EU 47 🇮🇹 EU 48 🇮🇹 EU 49 🇮🇹 EU 50 🇮🇹

Frequently Asked Questions

The Sidi ASPER runs true to size, so it matches standard sizing.

Your Sidi ASPER 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 Sidi size.

Yes, the Sidi ASPER runs true to size compared to standard Sidi sizing. Order your normal size.

Use the size chart above to convert between EU, US and UK sizes for Sidi ASPER. 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: 2026-10-17 17:50:05