Lisle's Feeler Gauges feature precision blades that ensure accurate measurements. Blades range from .0015" to .035", 1 brass blade of .010" for the Deluxe, and from .002" to .025" for the Standard. Deluxe and standard approximately 1/2" wide by 3-1/2" long. Whereas the Mini Feeler gauge blades range from .010" to .035" and are approximately 1/4" wide and 1-3/4" long.