ASICS to Under Armour Shoe Size Conversion

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

A ASICS 9 works out to a Under Armour 9.5 — about half a size up. The chart below has every size.

ASICS → Under Armour: size up half a size

A ASICS 9 is a Under Armour 9.5.

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

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

⚠️ Fit varies by model. ASICS runs true to size with a roomy toe box; wide fittings are widely available. Under Armour tends to run about half a size small, especially in performance trainers.

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

What is a ASICS 9 in Under Armour?

A ASICS 9 is about a Under Armour 9.5 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).

Do ASICS and Under Armour fit the same?

No — ASICS runs true to size and Under Armour runs small, so size up half a size when you switch.

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