Latex holster harness. 
Made with metal sliders to easily accommodate many sizes.

Latex has 2"-3" of stretch, measurements given are unstretched.
X-Small: underbust 20"-27"
Small-Medium: underbust 24"-35"
Large-XLarge: underbust 28"-42"
2XLarge-3XLarge: underbust 32"-52"