Minis are big time fun in small places. 2 ½ times smaller than regular Speed Stacks, Minis now come with a quick release carrier and four cool colors in every set. But don t let their small size fool you - they will test your stacking skills and provide a fine motor skills challenge. Minis are big time fun in small places - on a book, on your skateboard or on an airline tray table. They re also great for toting along when competition sized Speed Stacks won t fit into your backpacks, suitcases or pockets. Most importantly, Minis are another fun way to keep kids stacking. With Minis, kids can develop a unique finesse, speed and confidence that sharpens their fine motor skills and sequencing abilities while also giving them important skills that are transferable to competition Sport Stacking*. Dimensions: Each cup is 1 1/2".