Nike Dunk Low Retro DD1391-100 Size Guide: Real Measurements
What's My Size? | Perfitt footwear fit guide
Model: Nike Dunk Low Retro · Exact style DD1391-100
Quick Answer
Start with your usual Nike size if you already wear the brand comfortably. If you are between sizes, consider your foot width and preferred toe room before choosing. Historical Perfitt measurements below show the space inside selected labeled sizes, but do not by themselves establish a universal size-up or size-down rule.
Explore the current shoe
View the Nike Dunk Low Retro (DD1391-100) on the official Nike website. The official product page displays the brand's current product photos, color, sizes and availability.
Fit Snapshot: what the data actually supports
Fit dimension | Evidence-based result |
|---|---|
Inside length | Measured in the specific sizes below |
Inside width | Measured in the specific sizes below |
Instep height | Data pending — not measured in the selected records |
Overall roominess | Data pending — requires validated wear/fit observations |
1–5 fit score | Not assigned without model-level comparative fit evidence |
Measured by Perfitt: historical shoe interior dimensions, not consumer foot-length recommendations. A fit score is intentionally omitted rather than invented.
Perfitt measured shoe dimensions
Shoe label (KR/mm) | Inside length (mm) | Inside width (mm) |
|---|---|---|
250 | 264 | 88 |
275 | 289 | 93 |
The inside length is not the same as a wearer's foot length. Shoe construction, toe allowance, volume, socks and preferred fit all affect size choice. These measurements are a historical sample, not a guarantee of current production dimensions.
Official size conversion
Sizing system | 25 | 25.5 | 26 | 26.5 | 27 | 27.5 | 28 |
|---|---|---|---|---|---|---|---|
US Men | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 |
UK | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 |
EU | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 |
Conversion note: The table above follows the brand's published chart for these size labels. Brand CM/JP labels should not be confused with measured interior length or bare-foot length. Check the linked official chart for the full range.
Choosing your size by foot type
Regular-width feet
Begin with your usual Nike size. Compare how that size feels in other Nike shoes you already own, and check the current return policy before ordering.
Wide feet or a high instep
If you often feel pressure across the forefoot or top of your foot, avoid relying on the length label alone. Compare the measured interior width where available, and consider trying adjacent sizes or a wider alternative. Going up in length does not guarantee sufficient width or instep volume.
Prefer a snug or relaxed fit?
Choose based on your familiar brand size, sock thickness and toe clearance. If between sizes, a relaxed-fit preference may favor the larger option, while a close-fit preference may favor the smaller option, provided toes are not compressed.
Perfitt Verdict
The useful insight is model-specific: Nike Dunk Low Retro DD1391-100 has directly recorded internal dimensions in 2 labeled sizes. That evidence helps compare shoes with the same size label, but does not establish a population-level fit rating. For an actual purchase, start from your known worn size and confirm against the brand chart and your fit preference.
Frequently asked questions
Does the Nike Dunk Low Retro run true to size?
Our selected measurement records alone cannot establish that for all wearers. Start with your familiar Nike size and use official guidance and fit preference to refine the choice.
Why is the inside length longer than the size label?
The size label and interior shoe dimension describe different things. A shoe requires internal allowance beyond the foot's length, and that allowance varies by construction.
Should wide feet go half a size up?
Not automatically. Extra length is not equivalent to extra width. Check available width options and fit comfort.
Are these current-production measurements?
No. These are historical Perfitt measurement records; individual current pairs can vary.
Shop the model
See current Nike Dunk Low Retro product photos, sizes and availability at Nike
Affiliate disclosure: Perfitt may earn a commission from qualifying purchases through future affiliate links. This does not affect our fit analysis. The current official link is not represented as a tracked affiliate link.
Sources and methodology
Perfitt Shoe Inner Measurement Master DB (Consolidated 2026-10), “브랜드별 모델 사이즈 실측 DB”, SKU DD1391-100, rows 10–11 (2 size records). Historic source; measurement date not independently verified in this post. Official product page: https://www.nike.com/dk/en/t/dunk-low-retro-shoes-zhqKMf/DD1391-100. Official size chart: brand footwear size guide.