Nike to Under Armour Shoe Size Conversion

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

Because Nike and Under Armour share the same fit tendency, your size carries straight across: a Nike 9.5 is a Under Armour 9.5.

Nike and Under Armour run the same

Order the same number — a Nike 9.5 is a Under Armour 9.5.

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

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

⚠️ Fit varies by model. Nike tends to run about half a size small — most people size up half, and lifestyle models (Air Force 1, Blazer) run especially snug. Under Armour tends to run about half a size small, especially in performance trainers.

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

What is a Nike 9.5 in Under Armour?

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

Do Nike and Under Armour fit the same?

Roughly, yes — both run small, so the same number fits.

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