Dimensions: 1.97 in x 0.39 in x 0.39 in
Weight: 0.6 oz
Pros: A very bright laser. probably the best and smallest you can get for this price. Very small, about half as small as my pinky but it produces a lot of light. Great for mounting on airsoft guns and fun to play with. Adjustable beam with and focus if you take off the top. Very good laser.
Cons: Nearly none. Every now and then it stops working and i need to gently flick to get it back.
Other Thoughts: Could have come with extra batteries.
Bottomline: if you want a cheap small laser. this is the one for you. brighter than most red laser pointers. You get much more than you pay for.