Part Dimensions in E9

We are going through our implementation of 9.05.604a and I am loading raw material parts using DMT now.
I noticed that in the DMT templates there are some dimension fields in the parts table that are not showing on the parts screen in Epicor.
We currently stock many different sheet sizes of the same material. I am setting up UOMs and UOM classes for these sheet sizes, but it seems like it would make more sense using dimensions.
Is this a feature that is being phased out in Epicor? What are others using to track sheet sizes?