Yes, US sizes are getting smaller. This is because the average size of Americans has been increasing over time due to higher rates of obesity and other factors. As a result, clothing companies have had to adjust their sizing standards in order to accommodate larger bodies, resulting in smaller US sizes overall. For example, in 1983 women's jeans were labeled with a size 12 but now they are commonly labeled as a size 10 or 8. Additionally, clothing manufacturers have also started producing items with more flexible materials that can better accommodate larger figures without sacrificing style or fit.