What size should I get in Nike A'One?

Shoe Fit calculates your millimeter shoe cavity to recommend your exact size in the Nike A'One by comparing against shoes you already own.

NikeMen's

A'One

Fit verdict, size conversion guide, and millimeter measurements.

Find Your Size

Fit Analysis & Sizing Advice

Order 1 Full Size Up

This shoe runs approximately 8mm shorter than standard sizing. Most wearers need a full size larger for comfortable toe room.

Runs Small (–8mm)True to SizeRuns Large (+8mm)

Snug / 1 Size UpStandard fitRoomy / 1 Size Down

Width: Narrow Fit. Tends to feel snug across the midfoot and forefoot. Wide-foot wearers should consider sizing up or looking for wide widths.

Community Fit Consensus

Aggregated feedback from verified shoe owners

2.1

(10 ratings)

35% of wearers report this shoe fits True to Size.

Length Distribution

Runs Small62%

True to Size35%

Runs Large3%

Width Distribution

Runs Narrow45%

Standard Width51%

Runs Wide4%

Complete Size Chart

Showing 38 sizes

EU	US (M)	UK	Foot Length	Cavity Length
35.5	3.5	3	21.6 cm	224 mm
36	4	3.5	22.0 cm	228 mm
36.5	4.5	4	22.4 cm	232 mm
37.5	5	4.5	22.9 cm	237 mm
38	5.5	5	23.3 cm	241 mm
38.5	6	5.5	23.7 cm	245 mm
39	6.5	6	24.1 cm	249 mm
40	7	6	24.5 cm	253 mm
40.5	7.5	6.5	25.0 cm	258 mm
41	8	7	25.4 cm	262 mm
42	8.5	7.5	25.8 cm	266 mm
42.5	9	8	26.2 cm	270 mm
43	9.5	8.5	26.7 cm	275 mm
44	10	9	27.1 cm	279 mm
44.5	10.5	9.5	27.5 cm	283 mm
45	11	10	27.9 cm	287 mm
45.5	11.5	10.5	28.3 cm	291 mm
46	12	11	28.8 cm	296 mm
47	12.5	11.5	29.2 cm	300 mm
47.5	13	12	29.6 cm	304 mm
48	13.5	12.5	30.0 cm	308 mm
48.5	14	13	30.5 cm	313 mm
49	14.5	13.5	30.9 cm	317 mm
49.5	15	14	31.3 cm	321 mm
50	15.5	14.5	31.7 cm	325 mm
50.5	16	15	32.2 cm	330 mm
51	16.5	15.5	32.6 cm	334 mm
51.5	17	16	33.0 cm	338 mm
52	17.5	16.5	33.4 cm	342 mm
52.5	18	17	33.9 cm	347 mm
53	18.5	17.5	34.3 cm	351 mm
53.5	19	18	34.7 cm	355 mm
54	19.5	18.5	35.1 cm	359 mm
54.5	20	19	35.5 cm	363 mm
55	20.5	19.5	36.0 cm	368 mm
55.5	21	20	36.4 cm	372 mm
56	21.5	20.5	36.8 cm	376 mm
56.5	22	21	37.2 cm	380 mm

Frequently Asked Questions

Does the Nike A'One run big or small?

No, it runs significantly small. We recommend ordering one full size up. This shoe runs approximately 8mm shorter than standard sizing. Most wearers need a full size larger for comfortable toe room.

How does Shoe Fit determine shoe sizing?

Shoe Fit calculates the real-world interior shoe cavity in millimeters combined with real owner feedback, rather than relying on arbitrary brand charts.

Find Your Exact Size

Already own a shoe that fits well? Shoe Fit cross-references its internal cavity against the Nike A'One to give you your personalized size.

Instant recommendation

Accounts for width & stretch

No sign-up required

Compare With Your Shoe

Model Details

BrandNike

ModelA'One

Gender SpecMen's

Sizes Offered38 sizes

Community Rating2.1 ★ (10 votes)

Fit Data SourceCommunity Validated

Own this shoe?

Help other shoppers find their perfect fit by adding your rating.

Rate Your Pair

All Nike Shoes•Back to Shoe Recommender