What is size 40 in a speedo swimsuit?

In Speedo swimsuits, size 40 typically corresponds to a men's size medium, which generally fits waist measurements of around 34-36 inches. For women's sizes, a size 40 often translates to a larger size, usually around a 14-16, depending on the specific style and cut of the swimsuit. It's always best to consult the brand's sizing chart for the most accurate fit.