They're not the smallest parrots―that distinction belongs to the parrotlet―but budgies are quite tiny. Most budgies in captivity average between 7 or 8 inches from the beak to the tip of the tail. Wild budgies in their native habitat of Australia are even smaller.
Not many people realize that there are actually two distinct types of budgies―the traditional Budgerigar, hailing from Australia, and the larger English budgie, bred in England specifically for the show and the pet trade. While the two are clearly both budgies, there are differences when they're observed side by side.
There's no way to guarantee that your budgie, or any other parrot, will learn to "speak." However, budgies certainly have a knack for it, and many times they speak with greater clarity and broader vocabularies than larger parrot species such as macaws and cockatoos.
Since they're small, budgies are relatively inexpensive to care for and feed. But contrary to popular belief, a diet consisting only of seeds is not good for a small bird like a budgie, and can even cause health problems. Instead, veterinarians recommend a budgie diet that includes pellets and fresh fruits and vegetables including leafy greens