New Balance P400 'Grey Days'

Name: New Balance P400 'Grey Days'
Brand: New Balance
SKU: UFFBB5WD
Availability: InStock

New Balance · Style UFFBB5WD · Released 2026-04-15

from $135.70

Select a size:

Use the chart below to convert between US, UK, EU and JP sizes.

US	UK	EU	JP (cm)
7	6.5	40	25
7.5	7	40.5	25.5
8	7.5	41.5	26
8.5	8	42	26.5
9	8.5	42.5	27
9.5	9	43	27.5
10	9.5	44	28
10.5	10	44.5	28.5
11	10.5	45	29
11.5	11	45.5	29.5
12	11.5	46.5	30
12.5	12	47	30.5
13	12.5	47.5	31
14	13.5	49	32
15	14.5	50	33
16	15.5	51	34

US	UK	EU	JP (cm)
5	3	35	22
5.5	3.5	36	22.5
6	4	36.5	23
6.5	4.5	37	23.5
7	5	37.5	24
7.5	5.5	38	24.5
8	6	39	25
8.5	6.5	40	25.5
9	7	40.5	26
9.5	7.5	41	26.5
10	8	41.5	27
10.5	8.5	42.5	27.5
11	9	43	28
11.5	9.5	43.5	28.5
12	10	44	29

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14-day returns & equal-value exchanges — policy

Size, price & UPC details

Size	Price	UPC	Delivery
US M 6.5 / W 8	$135.70	—	7-10 business days
US M 7 / W 8.5	$162.10	—	5-7 business days
US M 7.5 / W 9	$135.70	198689835126	7-10 business days
US M 8 / W 9.5	$162.10	198689835140	5-7 business days
US M 8.5 / W 10	$135.70	198689835171	7-10 business days
US M 9 / W 10.5	$155.50	198689835218	5-7 business days
US M 9.5 / W 11	$135.70	198689835249	7-10 business days
US M 10 / W 11.5	$155.50	—	5-7 business days
US M 10.5 / W 12	$135.70	198689835317	7-10 business days
US M 11 / W 12.5	$176.40	198689835348	3-4 business days
US M 11.5 / W 13	$135.70	198689835287	7-10 business days
US M 12 / W 13.5	$181.90	198689835416	5-7 business days
US M 12.5 / W 14	$221.50	—	5-7 business days
US M 13 / W 14.5	$181.90	198689835379	5-7 business days
US M 14 / W 15.5	$181.90	198689835546	5-7 business days