Hello, for 160 cm height and 80 kg measurements, Tutku lycra snap-on bodysuit with thick straps (bodysuit) model, size XXL (size 5) will be suitable. XXL Size (Size 5): Despite the product having a lycra and elastic jersey texture, the XXL size will fit perfectly for a 80 kg measurement in snap-on body models to prevent the length and body from getting tight, to close comfortably from the bottom, and to offer comfortable use all day long. If you want it to be extremely tight on the body, size XL (Number 4) can also be considered; however, to prevent the snap area from stretching and for the chest/hip area to be comfortable, our primary recommendation is XXL (Number 5). We wish you pleasant shopping!