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Nike Ja 4 'Nightmare'

Name: Nike Ja 4 'Nightmare'
Brand: Nike
SKU: IM4135-405
Availability: InStock

Nike · Style IM4135-405 · Released 2026-08-13

from $181.90

Select a size:

Size chart — Nike

Full Nike size guide

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

Men

US	UK	EU	JP (cm)
3.5	3	35.5	22.5
4	3.5	36	23
4.5	4	36.5	23.5
5	4.5	37.5	23.5
5.5	5	38	24
6	5.5	38.5	24
6.5	6	39	24.5
7	6	40	25
7.5	6.5	40.5	25.5
8	7	41	26
8.5	7.5	42	26.5
9	8	42.5	27
9.5	8.5	43	27.5
10	9	44	28
10.5	9.5	44.5	28.5
11	10	45	29
11.5	10.5	45.5	29.5
12	11	46	30
12.5	11.5	47	30.5
13	12	47.5	31
13.5	12.5	48	31.5
14	13	48.5	32
14.5	13.5	49	32.5
15	14	49.5	33
15.5	14.5	50	33.5
16	15	50.5	34
16.5	15.5	51	34.5
17	16	51.5	35
17.5	16.5	52	35.5
18	17	52.5	36
18.5	17.5	53	36.5
19	18	53.5	37
19.5	18.5	54	37.5
20	19	54.5	38
20.5	19.5	55	38.5
21	20	55.5	39
21.5	20.5	56	39.5
22	21	56.5	40

Women

US	UK	EU	JP (cm)
3.5	1.5	33.5	21
4	1.5	34.5	21
4.5	2	35	21.5
5	2.5	35.5	22
5.5	3	36	22.5
6	3.5	36.5	23
6.5	4	37.5	23.5
7	4.5	38	24
7.5	5	38.5	24.5
8	5.5	39	25
8.5	6	40	25.5
9	6.5	40.5	26
9.5	7	41	26.5
10	7.5	42	27
10.5	8	42.5	27.5
11	8.5	43	28
11.5	9	44	28.5
12	9.5	44.5	29
12.5	10	45	29.5
13	10.5	45.5	30
13.5	11	46	30.5
14	11.5	47	31
14.5	12	47.5	31.5
15	12.5	48	32
15.5	13	48.5	32.5
16	13.5	49	33
16.5	14	50	33.5
17	14.5	50.5	34
17.5	15	51	34.5
18	15.5	51.5	35
18.5	16	52	35.5
19	16.5	52.5	36
19.5	17	53	36.5
20	17.5	53.5	37
20.5	18	54	37.5
21	18.5	54.5	38
21.5	19	55	38.5
22	19.5	55.5	39
22.5	20	56	39.5

Kids

US	UK	EU	JP (cm)
1C	0.5	16	7
2C	1.5	17	8
3C	2.5	18.5	9
4C	3.5	19.5	10
5C	4.5	21	11
6C	5.5	22	12
7C	6.5	23.5	13
8C	7.5	25	14
9C	8.5	26	15
10C	9.5	27	16
11C	10.5	28	17
12C	11.5	29.5	18
13C	12.5	31	19
1Y	13.5	32	20
1.5Y	1	33	20.5
2Y	1.5	33.5	21
2.5Y	2	34	21.5
3Y	2.5	35	22
3.5Y	3	35.5	22.5
4Y	3.5	36	23
4.5Y	4	36.5	23.5
5Y	4.5	37.5	23.5
5.5Y	5	38	24
6Y	5.5	38.5	24
6.5Y	6	39	24.5
7Y	6	40	25

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Size, price & UPC details

Size	Price	UPC	Delivery
US M 3.5 / W 5	—	199780294331	Out of stock
US M 4 / W 5.5	—	199780304825	Out of stock
US M 4.5 / W 6	—	199780337311	Out of stock
US M 5 / W 6.5	—	199780294362	Out of stock
US M 5.5 / W 7	—	199780326971	Out of stock
US M 6 / W 7.5	$183.00	199780333733	5-7 business days
US M 6.5 / W 8	$183.00	199780307185	5-7 business days
US M 7 / W 8.5	$183.00	199780295000	5-7 business days
US M 7.5 / W 9	$181.90	199780314855	5-7 business days
US M 8 / W 9.5	$181.90	199780294720	5-7 business days
US M 8.5 / W 10	$181.90	199780339056	5-7 business days
US M 9 / W 10.5	$181.90	199780292030	5-7 business days
US M 9.5 / W 11	$181.90	199780309615	5-7 business days
US M 10 / W 11.5	$181.90	199780332965	5-7 business days
US M 10.5 / W 12	$181.90	199780317986	5-7 business days
US M 11 / W 12.5	$181.90	199780327930	5-7 business days
US M 11.5 / W 13	$181.90	199780329613	5-7 business days
US M 12 / W 13.5	$181.90	199780297271	5-7 business days
US M 12.5 / W 14	$183.00	199780312547	5-7 business days
US M 13 / W 14.5	$181.90	199780321853	5-7 business days
US M 13.5 / W 15	—	199780335201	Out of stock
US M 14 / W 15.5	$181.90	199780306492	5-7 business days
US M 15 / W 16.5	—	199780292207	Out of stock
US M 16 / W 17.5	—	199780328272	Out of stock
US M 17 / W 18.5	$183.00	199780289375	5-7 business days
US M 18 / W 19.5	$183.00	199780299961	5-7 business days

About the Nike Ja 4 'Nightmare'

The Nike Ja 4 'Nightmare' delivers the launch colorway of Ja Morant's fourth signature shoe. A gradient blend of green and blue coats the lightweight foam upper, featuring a textured haptic overlay that provides added durability and support. A metallic iridescent finish is applied to the reverse lateral-side Swoosh, as well as the JA-frame that wraps the midfoot. The cushioning setup combines Nike's SPRPWR sockliner with a full-length Cushlon 3.0 midsole. Underfoot, the rubber outsole utilizes a Ja logo-inspired traction pattern for reliable grip.