Vintage 60s Tie-Waist Set with Top and Pants

Great vintage set from the 60s in pale blue. Fabric has texture with a raised print. Very good vintage condition. Estimate it is a modern day size XS. I am a size 0 or 2 and it fits me. Pants have elastic waist. No composition tags, but feels synthetic. Has just a bit of stretch. The material is quite thick.