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Calculating for Blum Undermount Glides

  • Width: Subtract 3/8″ from the cabinet opening’s width
  • Height: Subtract 1″ or more from the cabinet opening’s height
  • Depth: Standard size drawer glides will require 1″ of available depth in the cabinet. For example, to use 21″ glides, cabinet depth needs to be at minimum 22″ deep to accommodate space for the drawer and hardware.