What is the next bra size after 36dd?

The next bra size after 36DD is typically 36DDD (or 36E, depending on the brand). Bra sizing can vary between manufacturers, so it's always a good idea to try on different styles and sizes for the best fit. Additionally, you could also consider increasing the band size to 38 while decreasing the cup size to D, resulting in a 38D, which can also provide a different fit.