The Mini Cooper at 1/28 scale by Kinsmart measures about 5 inches long by about 2.25 inches wide by about 2 inches high. It has very nice details such as separate clear plastic headlights, taillights, mirrors and grill.
The coloring is done is high gloss finish with accurate markings and branding. The wheels are free rolling and made of rubber. Moreover the back wheels have pull back action, which means that it will wind up when you pull it back and it will roll if you let it go. The rolling motion is very smooth so be mindful of where you display it (or chuck the wheels).
The doors can open revealing nice interior details such as accurate seats, steering wheel, and instrument panel. At 1/28 scale these models are about the size of a regular computer mouse. The detail and accuracy of the model is very impressive. These models don't sacrifice on detail or quality to size.