The blocks - as drawn in the book - 'finish' to 4.5 inches
I was also disappointed in the presentation of the blocks in the book.
In my opinion - the author could have drawn better representations of some of the blocks.
As far as I know, the software has 'fixed' that. I have an older Mac, so the software would not work on the computer I have, so I didn't buy it.
I think half the fun of the blocks I've made was in trying to figure out how Miss Jane designed and assembled her blocks.
There are MANY threads - and blogs - about the Dear Jane (or Jane A Stickle) quillt.