Catalina sizing

[KrittleB]

Hi I’m finding it difficult to buy Catalina clothing online was the sizing says the weight of the person and height and
A number such as a 38 but how do you calculate the right sizing? Any help is appreciated. I also do ask for sizing such as bust and waist measurements but I thought someone might know how they worked out their label sizing.

 

[anothertimevintageapparel]

What is the garment you that goes with the label?
Depending on what it is, say a blouse, the 38 would be the bust sizing