Vtg. Sexy blue slip

This gorgeous slip is so adorable. Very good condition for vintage. Has discoloration at the arm pits-see picture. Seam on hem is in white thread-maybe a repair. Not perfect but pretty. This would be cute under a like colored dress that may be a bit short so the pretty hem would show. No label- so I do not know size or fabric. Please see the flat measurements below. Could be handmade. PTP 16.5” Waist 15” Hip 19” Length 35.5”