J Crew, classy navy ivory dress

This dress has a-lot of bounce and flow in classy way. Outside layer is a medium weight silk, inside lining is poly. Zip/hook back, straps adjustable, you could wear bra because it doesn’t dip that low in front, and there is seaming along top so it fits curves. I’m 5’9 and it goes just below knees. From top arm pit side it is 31.5 inch long. Across armpits 16in. I find to be true size 8. The construction/detail is supreme. I love this dress but at 64 yo - it’s too young looking for me.