Yes, while I cannot 100% prove that males were larger, evidence from closely related animals, plus the fact that the default on land (among creatures with a backbone) says that is is true that the male is larger. Anything which defies this trend is called reverse sexual dimorphism (present in a few species), indicating that the normal form for the majority is for the male to be larger.
In nearly all animal groups (apart from mammals and birds), females are larger than males because larger females tend to produce more eggs and contribute more young to the next generation.
In many species, including most mammals, the male is larger than the female.[1] In others, such as most insects, spiders, birds, reptiles and amphibians, many fish, and certain mammals such as the spotted hyena, the female is larger than the male.
Most species are insects or other invertebrates. I'm not talking about ALL animals, just terrestrial vertebrates; yes, female ants and bees may be larger, but not female crocodiles, lions, horses, apes, or elephants (and so on...)