I was looking for a basket that was about four inches deep. What I found at Target was a container that is 9-13/16 inches x 7-15/32 inches x 3-29/32 inches. I guess that is close enough!
There are certainly times where precision is warranted, but the dimensions of a plastic basket is not one of them. Consider your audience: is the basket being used by a consumer who wants something that is about four inches or a contractor who needs to something to fit exactly?
Don’t waste your energy on calibrating things that can be described in looser terms and take the time to provide detail where it is helpful. Reversing the two only provides a measure of frustration for everyone.