6" tall x 5 1/4" wide. The holes are cut out for 1/4" x 1/4" round or square neodymium permanent magnets. This invention is meant to help inventors to further invent and perform tests of their own. The rotor has an 6mm hole in the center for a 6mm shaft. The rotor has 24 slots for 24 magnets. Both arms of the stator combined have 18 slots for magnets. The stator has 3 sets of 6 permanent magnets each, the magnets are also spaced 15° apart; however, the 3 sets of permanent magnets are not spaced equally 120° apart, they are offset 5° to each other for a total of 15° to help create more imbalance in the motor. While some permanent magnets are approaching the critical point, others are leaving the critical point and the 3rd set is head on. Permanent magnets are included with this product. The actual product and color may slightly differ from the images. If you'd like to do your own configuration on the stator and rotor, email us and we will send you the magnets separate and uninstalled so you can do your own experimenting. We used a little bit of glue to hold the magnets in place for the model.