World's Smallest Transformers Set - Bundle with Mini Transformers Figures Including Optimus Prime & Bumblebee | Transformers Toys for Boys. This transformers mini actions figures set comes with 2 of the World's Smallest Transformers toys featuring Optimus Prime and Bumblebee. Each figure measures just 1.5" tall. Sure to be a hit with Transformers fans of all ages, these mini figurines are perfect to use as party supplies, party favors, and goodie bag fillers at your next Transformers themed birthday party. These miniature Transformers are perfect to add to your collection of Transformers toys or can be displayed in the packaging.