There is no definitive answer to this question as the size of the two vehicles can vary depending on the model and trim level. However, in general, the Maverick is considered to be slightly larger than the Frontier. This can be seen in the overall length and width of the two vehicles, as well as in their interior cabin space. When it comes to cargo capacity, the Maverick again has a slight advantage over its competitor. So, if you're looking for a bigger vehicle, then the Maverick may be a better option for you.