adidas to Allbirds Shoe Size Conversion

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

Reviewed by the 247Sizing teamLast updated: 12 August 2026

adidas runs 0.5 size larger than Allbirds, so you may need to size down when switching.

Size up 0.5 moving to Allbirds

Allbirds runs smaller — order half a size larger than your adidas size.

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

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

⚠️ Fit varies by model. adidas generally runs about half a size small, particularly lifestyle and Ultraboost models; Sambas and Gazelles run long and narrow. Allbirds runs true to size; half sizes are rounded, so go to the nearest whole.

Allbirds to adidas → · adidas chart · Allbirds chart · Brand finder

What is a adidas 10.5 in Allbirds?

A adidas 10.5 is about a Allbirds 10 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).

Do adidas and Allbirds fit the same?

Not quite — Allbirds runs about 0.5 size smaller than adidas.

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