VTG 90s Tankini Set swimsuit small medium?

Really fab vintage 90s swimsuit!!! I love it it’s just a tad big on me. It’s tagged a vintage size 10 but I’m an XS/S and this fits like a larger small or maybe a medium? Check measurement photos for detail VG shape. The back legs of the bottoms have slight stretch, nothing crazy. I am able to wear it no problem. Maybe a bigger booty is needed 😂 Clean and from a pet and smoke free home