What size is New Balance US 8 in Asics?

About Asics US 8 (EU 41), matched by ~25.5 cm. Then adjust for the specific model.

Is a New Balance 8 the same as a Asics 8?

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.

New Balance US 8 maps to about 25.5 cm on that brand’s chart. The nearest Asics row at that length is US 8 / EU 41.

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

New Balance: 550 (runs narrow) · 990v6 (runs big) · 9060 (true to size) · 574 (true to size) · 2002R (true to size)

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

What size is New Balance US 8 in Asics?: About Asics US 8 (EU 41), via ~25.5 cm.
Where is the full size table?: New Balance to Asics compare.