What size is Asics US 11 in Brooks?

About Brooks US 11 (EU 45), matched by ~27.8 cm. Then adjust for the specific model.

Is a Asics 11 the same as a Brooks 11?

Not always. Labels can map to different foot lengths — use cm, then model fit.

Brand-to-brand size at a fixed US label — matched by foot length (cm), not guesswork.

Asics US 11 maps to about 27.8 cm on that brand’s chart. The nearest Brooks row at that length is US 11 / EU 45.

Same chart cm can still feel different on foot. Read the guides:

Asics: Gel-Kayano 31 (true to size) · Gel-1130 (true to size)

Brooks: Ghost 16 (true to size) · Glycerin 21 (true to size)

What size is Asics US 11 in Brooks?: About Brooks US 11 (EU 45), via ~27.8 cm.
Where is the full size table?: Asics to Brooks compare.