When looking through the 1491 "Diet" images at Acclaim Images.com this A Tape Measure was a favorite.
All of their pictures are hand picked, availiable in a number of formats, and you can even get custom prints and posters.

Description:
A Tape Measure
A curling tape measure in green cast.

Some related terms for more images:
dressmaking,  numbers,  st yiap,  curl,  diet,  spiral,  dimension,  slimming,  tailoring,  measurement,  object,  still life,  centimetre,  inch,  size,  weight loss,  tape measure,  imperial,  twisted,  concept,  width,  waistline,  height,  dieting,  length,  marking,  metric system,  scale,  tapeline,  breadth,  quantify,  figures,  twisting,