The meter arrived without test leads in the box so I have to go thru the return/replace process. Description says the Product Dimensions are: 5 x 1.2 x 3.5 inches. The actual size is about 7.5" long x 1.2" thick x 3.5" wide. With the protective boot on it, add another 0.5" to all 3 dimensions. It is the same size as a Fluke 87. For reference the boot is PVC material and has a funny odor (not pleasant to me and different froma a Fluke 87 boot). The 4 star rating is for the functionality and price. Pretty awesome overall.