Nike to Allbirds Shoe Size Conversion

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

A Nike 9.5 works out to a Allbirds 9 — about half a size down. The chart below has every size.

Nike → Allbirds: size down half a size

A Nike 9.5 is a Allbirds 9.

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

Nike size	Allbirds size	UK	EU	Foot (cm)
7	6.5	5.5	37	23.5
7.5	7	6	38	24.3
8	7.5	6.5	38.5	24.7
8.5	8	7	39.5	25.1
9	8.5	7.5	41	25.9
9.5	9	8	41.5	26.3
10	9.5	8.5	42.5	26.7
10.5	10	9	43	27.1
11	10.5	9.5	43.5	27.5
11.5	11	10	44	27.9
12	11.5	10.5	44.5	28.3
12.5	12	11	45.5	28.7
13	12.5	11.5	46	29.1
13.5	13	12	47	29.5
14	13.5	12.5	47.5	29.9
14.5	14	13	48	30.3
15	14.5	13.5	49	31.1
15.5	15	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. Allbirds runs true to size; half sizes are rounded, so go to the nearest whole.

Allbirds to Nike → · Nike chart · Allbirds chart · Brand finder

What is a Nike 9.5 in Allbirds?

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

Do Nike and Allbirds fit the same?

No — Nike runs small and Allbirds runs true to size, so size down half a size when you switch.

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