Vintage 1960s yellow cotton striped swimsuit, vintage size 16/38. Would fit a medium to large. The swimsuit has adorable ruching on the back of the full coverage bottoms and top. Fastens with buttons. The swimsuit is in excellent condition. There is a faint dotted mark on the right cup. The bottoms appear to have had the elastic modified. It appears a small opening was once cut on the side. 

Measurements (lying flat):
Bottoms-
Waist 11" stretches to 17"
Leg opening 10"
Center waist to center of the gusset 12.75"

Top- 
Band 14" when two buttons fastened
14.5" when one button is fastened
Cup width at center seam about 8.75"