De Weese Designs, 1950/60's black lace with nude underlay bathing suit and black lace cover up with single button neck closure and cap sleeves.  Original manufacturer's tags,  ruched backside w/ scooped back, nylon cups, nylon lined front panel, material =lace;  and unknown/ stretchy.
 
Excellent vintage condition - never worn, no holes/stains or visible damage
 
https://vintagefashionguild.org/label-resource/deweese-design/
 
Measurements:
*this item stretches
Bust- 36"
Waist- 22-27"
Hips-34- 36"
Total length: 21-23"
Size Vintage 34 - Modern day small; size 4/6. Displayed on a size 4 mannequin - fits well everywhere except the suit is a size larger in the bust. Mannequin measures 34" bust | 26" waist | 36" hips