Clarks to Under Armour Shoe Size Conversion

Switching from Clarks to Under Armour? Clarks runs large and Under Armour runs small, so the size you order changes. Here's the full chart.

Reviewed by the 247Sizing teamLast updated: 12 August 2026

Under Armour runs 1 size larger than Clarks, so you may need to size down when switching.

Size down 1 moving to Under Armour

Under Armour runs larger — order half a size smaller than your Clarks size.

Find your Clarks size on the left, read across for Under Armour:

Clarks size	Under Armour size	UK	EU	Foot (cm)
6.5	7.5	5.5	37	23.5
6.5	7.5	5.5	37.5	23.9
7	8	6	38	24.3
7.5	8.5	6.5	38.5	24.7
8	9	7	39.5	25.1
8	9	7	40	25.5
8.5	9.5	7.5	41	25.9
9	10	8	41.5	26.3
9.5	10.5	8.5	42.5	26.7
10	11	9	43	27.1
10.5	11.5	9.5	43.5	27.5
11	12	10	44	27.9
11.5	12.5	10.5	44.5	28.3
12	13	11	45.5	28.7
12.5	13.5	11.5	46	29.1
13	14	12	47	29.5
13.5	14.5	12.5	47.5	29.9
14	15	13	48	30.3
14	15	13	48.5	30.7
14.5	15.5	13.5	49	31.1
15	16	14	49.5	31.5

⚠️ Fit varies by model. Clarks runs about half a size large for many styles; wide fittings are available. Under Armour tends to run about half a size small, especially in performance trainers.

Under Armour to Clarks → · Clarks chart · Under Armour chart · Brand finder

What is a Clarks 10.5 in Under Armour?

A Clarks 10.5 is about a Under Armour 11.5 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).

Do Clarks and Under Armour fit the same?

Not quite — Under Armour runs about 1 size larger than Clarks.

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