What US size is 27.5 cm?

Often around US 10.5 in Nike, but brands differ — use the table and model guides.

How should I measure?

Stand, heel against a wall, mark longest toe; measure in cm. Then open the cm converter and the model fit page.

Foot length in centimetres mapped to brand US/EU labels from reference charts — not a Mondopoint guarantee.

Nearest chart row within 0.35 cm — labels can still disagree across brands.

Brand	US	EU	Chart cm
Nike	10.5	44	27.5
Adidas	10.5	44.5	27.5
New Balance	10.5	44.5	27.6
Doc Martens	10	44.5	27.3
Asics	10.5	44.5	27.4
Brooks	10.5	44.5	27.5
Converse	10	44	27.4
Crocs	10	44	27.5
Hoka	10.5	44.5	27.4
Jordan	10.5	44.5	27.5
On	10.5	44.5	27.4
Reebok	10.5	44.5	27.5
Salomon	10.5	44.5	27.3
UGG	10.5	44.5	27.4
Vans	10.5	44.5	27.6
Yeezy	10.5	44.5	27.4

cm → label is a start. Lasts still run long/short/narrow:

Nike: Air Force 1 '07 (runs big) · Dunk Low (true to size)

Adidas: Samba OG (runs narrow) · Gazelle (runs big)

New Balance: 550 (runs narrow) · 990v6 (runs big)

Doc Martens: 1460 8-Eye Boot (runs big) · 1461 3-Eye Shoe (runs big)

What US size is 27.5 cm?: Often near Nike US 10.5; compare brands in the table, then read model guides.
Is chart cm the same as lab internal length?: No. Chart cm is recommended foot length / Mondopoint-style. Lab internal length (when we have it) is a different measurement on model pages.