How do Northwave shoes size up, normal or small etc?

My sparta’s sized up exactly as my civvies.

Just got some winter boots and they size up normally. Roomy toe box.
I returned some lakes as they were small, narrow.
Nw similar fit to my older shimano boots with perhaps a little extra room

Mine sized up the same as my normal shoes.
They are a little bit more generous width wise than others I tried.

Artic (sic) boots sized up normal.

I’ve wide feet, and they are fine – plenty of space for thick socks.

Yep, as per your normal shoes. Great shoes, I love them.