April, I think because you are small framed,... if you are like me you just feel *LOST* and shapeless in a sack dress....I do understand, having spent many years in clothes that were too big for me...
However, I actually own 3 sack dresses now, and yes I do belt them 99.9% of the time. I LOVE them now.They are *VERY* flattering on us small frames...like Angies black one... I also own...and belt.
I am not as fashion *secure* as our beautiful Angie ,who could pull off a paper bag, ...done right .. and still look FAB:)
But I love how she puts these sack dresses with leggings...but it just doesn't work for me (not secure with that yet)....heaven knows I have tried:(
Anyway my point being don't give up on the sack dress just yet... try and add a belt.