Ultraboost v23
Width options: standard, wide (Men's) / standard, wide (Women's)
Not enough evidence yet
4 of 4 runners said this shoe fit true to size.
Sizing vs. popular reference shoes
| If you wear | Length | Width | Toebox | Reports |
|---|---|---|---|---|
New Balance Fresh Foam 1080 12 (Women's) 8.5100% 1 of 1 runners landed on 8.5 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 8.5-8.5 |
New Balance Fresh Foam 1080 13 (Women's) 9100% 1 of 1 runners landed on 9 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 9-9 |
Nike Pegasus 39 (Women's) 6.5100% 1 of 1 runners landed on 6.5 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 6.5-6.5 |
Salomon Pulsar Trail Pro 2 (Men's) 9100% 1 of 1 runners landed on 9 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 9-9 |
1 of 1 runners landed on 8.5 (0.5 weighted).
1 of 1 runners landed on 9 (0.5 weighted).
1 of 1 runners landed on 6.5 (0.5 weighted).
1 of 1 runners landed on 9 (0.5 weighted).
Your size, to start
Start with your usual size unless strong runner evidence says otherwise. We don't yet have enough validated reports to confidently recommend a length-size change for the Adidas Ultraboost 23 (Men's).
Own the Adidas Ultraboost 23 (Men's)? A 20-second fit report helps other runners.
Add my fit reportCommunity reports
Across the full report set, this many called the shoe true to size.
Reports linked to a public source you can open and verify.
Signals for hotspots, blisters, or other pain points across the full report set.
Runner notes are AI-extracted sizing summaries from public running-shoe discussions. They are not quotes.
| Came from | Bought | Verdict | Runner note | Issues | When |
|---|---|---|---|---|---|
Salomon Pulsar Trail Pro 2 (Men's) Size EU-42 2/3 | 9 | True to sizeTrue to width | Reported fit vs Salomon Pulsar Trail Pro 2 (Men's) — true to length, true to width. | No issues | Mar 2026 |
Nike Pegasus 39 (Women's) Size 6.5 | 6.5 | True to sizeTrue to width | Reported fit vs Nike Pegasus 39 (Women's) — true to length, true to width. | No issues | Mar 2026 |
New Balance Fresh Foam 1080 12 (Women's) Size 8.5 | 8.5 | True to sizeTrue to width | Reported fit vs New Balance Fresh Foam 1080 12 (Women's) — true to length, true to width. | No issues | Mar 2026 |
New Balance Fresh Foam 1080 13 (Women's) Size 9 | 9 | True to sizeTrue to width | Reported fit vs New Balance Fresh Foam 1080 13 (Women's) — true to length, true to width. | No issues | Mar 2026 |
Reported fit vs Salomon Pulsar Trail Pro 2 (Men's) — true to length, true to width.
Reported fit vs Nike Pegasus 39 (Women's) — true to length, true to width.
Reported fit vs New Balance Fresh Foam 1080 12 (Women's) — true to length, true to width.
Reported fit vs New Balance Fresh Foam 1080 13 (Women's) — true to length, true to width.
Compare with popular shoes
See how the Adidas Ultraboost (Men's) fits side-by-side with shoes runners know well.
Swipe to compare more shoes.
