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Brunton Grain Size Card

The Brunton Grain Size Card is used for the visual classification of sediments by size and shape. This essential field geology reference tool can easily fit into a vest pocket, wallet or field pouch, so it can be referenced whenever and wherever needed. 


  • Waterproof, lightweight and durable card
  • Weather resistant
  • Transparent card stock with both negative and positive sides for easier reading and for comparing grain size in the field

Card data includes: 

  • 10 grain size classifications including phi scale
  • Grain shape reference
  • Millimetre ruler


    Description Brunton Grain Size Card
    Dimensions 63.5 x 93.3 x 2mm (2.5 x 3.675 x 0.06”)
    Weight 6g (0.2oz)