What if I am between sizes in the New Balance 550?

Between sizes in the New Balance 550: start with True to size length; half up if wide. Width and sock volume often matter more than splitting a half size.

Do the New Balance 550 work for wide feet?

This last is often narrow or low-volume. Narrow leather toebox â€” limited width SKUs Wide feet may need a half size up, a wide SKU, or a roomier sibling — see Related guides.

Should I size up in the New Balance 550 for thick socks or break-in?

Break-in: Leather break-in 5â€“10 wears. Thick socks add volume — try the sock you will wear with the usual size advice before jumping a full size. See the thick socks & boot break-in guides.

New Balance

550

Does the 550 run big or small?

The 550 is true to size in length but frequently called narrow through the forefoot. Average/narrow feet take TTS; wide feet often go hal…

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Runs Narrow True to size length; half up if wide

VerifiedLast reviewed 2026-08-13

Runs smallTrue to sizeRuns big

Length scale centered; primary issue is width (narrow).

Runs narrow: Narrow leather toebox â€” limited width SKUs

What size should you buy?

Your usual size

Interactive suggestion based on this model’s fit offset (+0 US). Always confirm with a retailer return policy.

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Measured / size chart (cm)

Numbers only when sourced. Empty fields stay blank — we do not invent mm.

Internal length: 26.8 cm (268.4 mm)
Forefoot width: 91.4 mm
Toebox width: 69.2 mm
Reference size: US_M9

Lab measurement · Source: RunRepeat lab · Updated: 2026-08-13

Lab cut at US men's 9. Shorter internal length than 2002R in this set.

Know your foot length? Open the cm → size converter.

New Balance size chart (foot-length cm)
US M	UK	EU	cm
6	5.5	38.5	23.6
6.5	6	39	24.1
7	6.5	40	24.6
7.5	7	40.5	25.1
8	7.5	41	25.5
8.5	8	42	26
9	8.5	42.5	26.3
9.5	9	43	26.8
10	9.5	44	27.2
10.5	10	44.5	27.6
11	10.5	45	28
11.5	11	45.5	28.5
12	11.5	46	28.9
13	12.5	47.5	29.8

Chart cm is approximate foot length for label matching — not a lab internal cut. Use the cm converter to map foot length across brands.

Fit scenarios

Between sizes: Start with the advice above, then confirm with the between-sizes / half-size guide.
Width: Length and width are separate — see wide feet / narrow fit.
Break-in: Plan for stiff leather or structured lasts — boot break-in sizing.

Width: Narrow leather toebox â€” limited width SKUs
Break-in: Leather break-in 5â€“10 wears

Summary

The 550 is true to size in length but frequently called narrow through the forefoot. Average/narrow feet take TTS; wide feet often go half up because dedicated wide widths are limited on many colorways. Expect stiff leather until broken in.

Sources: SoleFeed 550 (TTS length; narrow toe box) · KicksUnderCost 550 sizing (TTS; half up if wide) · RunRepeat owner votes (TTS majority) · methodology

Fit depth guide

New Balance 550 is a lifestyle basketball-inspired silhouette. Length is often near true to size for NB wearers, but width letters (D, 2E, and similar) decide comfort as much as the US number.

If you wear 550 in D and feel midfoot crush, try width before jumping a full size up. Coming from Nike Dunk or AF1, expect a different toe-box shape â€” do not assume identical US labels feel identical.

Half sizes are useful. Slightly long 550s can look fine but heel-slip on walking. Slightly short ones punish basketball-style toeboxes on wider feet.

Pair with 574 / 9060 / 990 comparisons when you own other NB models. Use model to model convert with your best-fitting NB as reference.

Draft lifestyle fit notes â€” verify against current NB charts and width availability.

What size did you take?

Anonymous fit check for New Balance 550. Helps future readers — we never invent crowd stats.

Community results stay private until 25 responses for this page — no fake percentages.

Prefer email? Fit feedback.

FAQ

Does the New Balance 550 run big or small?: Runs Narrow. True to size length; half up if wide The 550 is true to size in length but frequently called narrow through the forefoot. Average/narrow feet take TTS; wide feet often go half up because dedicated wide widths are limited on many colorways. Expect stiff leather until broken in.
What size should I buy in the New Balance 550?: True to size length; half up if wide
What if I am between sizes in the New Balance 550?: Between sizes in the New Balance 550: start with True to size length; half up if wide. Width and sock volume often matter more than splitting a half size.
Do the New Balance 550 work for wide feet?: This last is often narrow or low-volume. Narrow leather toebox â€” limited width SKUs Wide feet may need a half size up, a wide SKU, or a roomier sibling — see Related guides.
Should I size up in the New Balance 550 for thick socks or break-in?: Break-in: Leather break-in 5â€“10 wears. Thick socks add volume — try the sock you will wear with the usual size advice before jumping a full size. See the thick socks & boot break-in guides.

Generic US / UK / EU / cm reference

Secondary Mondopoint-style table. Prefer the brand chart in Measured / size chart (cm) when converting. Primary system: US_M.

US	UK	EU	cm
6	5.5	39	24.0
6.5	6	39.5	24.5
7	6.5	40	25.0
7.5	7	40.5	25.5
8	7.5	41	26.0
8.5	8	42	26.5
9	8.5	42.5	27.0
9.5	9	43	27.5
10	9.5	44	28.0
10.5	10	44.5	28.5
11	10.5	45	29.0
11.5	11	45.5	29.5
12	11.5	46	30.0
13	12.5	47.5	31.0

Where to buy

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