E-cigs come in various shapes and sizes. There are e-cigs that look like the real cigarettes while there are some which are quite bigger. E-cigs that have the same size as the real cigarettes are the Volt, the Bloog and the VaporTitan. The brands that are quite bigger than the actual cigarettes are the MVP V2, the ProVari, and the VaporShark DNA.
E-cigs that are larger than the real ones have larger batteries. This kind of e-cig needs an utmost care compared to other electronic cigarettes. But despite its sensitivity, they offer a better performance than the smaller ones.