The Smokebuddy Jr. is one of the most effective and advanced handheld air filtration units available today. This device is very easy to use. Simply remove both end caps seal your lips and exhale through the tapered end. As you use the device you notice that no smoke, vapor, or smell escapes the other side. Many people may claim to be able to create their own personal air filters but comparing those to the Smokebuddy is like comparing a moped to a Maserati. Wether you never want to avoid receiving another hotel bill for smoking in the room or just to keep the peace in your home The Smokebuddy is an accessory that every smoker needs in their arsenal. The Smokebuddy Jr. is 3.5" long and 2" wide.