We often judge our weight by the size clothes we wear. Unfortunately, the clothing industry has responded to the worsening obesity epidemic by gradually increasing the size of clothing. They do this to make us all feel better about the clothes we buy.
In one study, size 8 clothing increased by 2 1/2"(6.5 cm) between 1984 and 2004. The drift in clothing sizes is also occurring in the UK.
We advocate using your clothing size as a means to feedback weight gain. This works as long as you are using your current clothes.