How strict are airlines with cabin strollers that exceed measures by 2cm?

[cutiepushie]

FTM here. We’re looking into purchasing silver cross jet 3 as a travel buggy but can see the width is 2cm too big for most airlines but realistically, would this realistically be an issue?

TIA!

Very strict. Prepare for it to be ditched at the airport or to have to pay excess for the cabin, if they permit it to fly at all.

Yes, most airlines are very strict about the size. You'd likely be charged for it or told they won't board it.