Most people can notice a 3 cm height difference. But this doesn’t necessarily mean that a 3 cm difference in height is too large or a bad thing.
Is a 2 cm height difference noticeable? If you look really hard for it, then I’d say that a 2 cm height difference is noticeable when it exists between two people.
In the vast majority of cases, a 5 cm height difference will be noticeable because, in terms of human stature, 5 centimeters is not a small measurement.
A 4 cm height difference is definitely noticeable between two people because, in terms of human height, 4 centimeters is not a tiny measurement.
Is a 7 cm height difference noticeable? Yes, a 7 cm height difference between two people is definitely very noticeable.
A 12 cm height difference and a 13 cm height difference are both noticeable (but not excessive) height gaps.
A 10 cm height difference is a pretty significant and noticeable height gap, especially when it exists between two people.
A 20 cm height difference sounds like a very significant height gap. This is interesting because, in isolation, a 20 centimeter measurement really isn’t that big.
A 15 cm height difference is a pretty big and yet perfectly normal height difference for a couple to have.
Although a 10 inch height difference between couples is a lot, it’s not too much because height isn’t the most important thing in a relationship.