I'm 34 and almost 35 years old now and I still somewhat fit into a size 7 baby diaper.
I have to modify the size 7 diaper by taking the Velcro strip off and tearing it in half and gluing one to each side of the diaper.
Then I have to run some packing tape around the waist to hold it on.
When I was 18 I could pretty much fit into a large size baby diaper and I wish I was still that skinny.
I find baby diapers to be even better than most adult diapers other than the adult baby diapers.
It's great that you can still fit into baby diapers.
I'm wearing a Luvs size 7 diaper right now that I modified to fit.
I was wearing a Gentle Steps size 7 diaper a few hours ago and those are really squishy.
If I was as skinny as I was when I was 18 I could fit into them perfectly.
Even a Rascal and Friends size 6 fits me pretty good but I also have to modify it to get it to fit.