I remember I was so upset when they started making Goodnights smaller. Trust me, they did this years back, they restyled them, and my son was right on the edge of still fitting in them.
Then we went to the S/M Depends, and it was fine. (This tip is for later down the road of course, he is an adult and 160 pounds). Sometimes I get the womens instead of mens, they put more in the box (same price). Both work the same for DS, he only has an overnight BM situation, stays dry (somehow- it's a medical mystery).
And I take it off on my taxes as a medical expense.