Wow. That brings back some memories that I haven't thought of until now.
I was put in diapers quite a bit in that age range (every night plus sometimes during the day). I never really thought about what I looked like. I usually put PJ's or coveralls on right after a diaper change. The only times I had to focus on my diapers is at the end of a diaper change when my plastic pants would be put on. I'd still be on my back and lift my legs up for Mom to slide them up my legs. So I'd be looking down and seeing my plastic pants.
But it wasn't until we had our house remodeled that I can ever remember looking at myself in the mirror, full length. We had a new closet put in the bathroom with full length mirrors on sliding doors and the same thing in my folks bedroom. They had a his and hers closet, so the whole south wall was mirrors. When Mom started helping out my aunt with her kids, she put a changing table in their bedroom with all the diaper stuff. So all my diaper stuff was moved to their room (but I was too big for the table).
I remember getting my diaper put on for bed, lying on my parents bed. I'd look over at the mirror and see myself lifting up for a diaper or getting wiped off. I realized that picture looked just like a baby getting a diaper change. Although I was fully aware that I was a ‘big kid’ and in diapers, I guess seeing myself that way really started me feeling self conscious about it.
I never thought of this until now…my cousin was staying with us once and was in pampers full time. I remember he was the age he could say simple phrases…3? Which would have made around 10. For whatever reason I was in diapers too. I was in their bedroom and she had him up on the changing table. When he got his pamper on, she put him on the floor and then put a changing pad on her bed to change my diaper. After she was done with me I got off the bed and the both of us were standing in front of the mirror looking at ourselves. Just in t-shirts and diapers. I thought it was funny and Mom said something about the “two little babies”.
It wasn't until I started looking at myself in a diaper that I realized how babyish it actually looked!