To be fair, the
proportional change is more important than the total length. 2 inches off two feet is borderline unnoticeable, but 2 inches off 12 is a definitely more of a "whoa, that's a new look". And auburn-to-red depends on the lighting, ya know. and, and...
I was thinking of "she's falling for him at 5 cm/s"...but none of that quite works in context 🤷