UGG to Allbirds Shoe Size Conversion

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

A UGG 8.5 works out to a Allbirds 9 — about half a size up. The chart below has every size.

UGG → Allbirds: size up half a size

A UGG 8.5 is a Allbirds 9.

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

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

⚠️ Fit varies by model. UGG runs about half a size large and moulds to the foot — size down half, or a full size for slippers. Allbirds runs true to size; half sizes are rounded, so go to the nearest whole.

Allbirds to UGG → · UGG chart · Allbirds chart · Brand finder

What is a UGG 8.5 in Allbirds?

A UGG 8.5 is about a Allbirds 9 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).

Do UGG and Allbirds fit the same?

No — UGG runs large and Allbirds runs true to size, so size up half a size when you switch.

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