Newborn puppies should gain each day. For 8-week-old puppies that are just transitioning to their new homes, growth can be much more of a roller coaster.
Since this breed typically does not reach over 7 lbs. (though some pet Maltese do end up a bit larger than the standard, at 8 lbs. or so), the end goal is well within sight; however, the road to reach it will be unique for every puppy.
It is entirely possible for two 3-month-old Maltese puppies to be at different weights
(for example, 2.5 lbs. and 4 lbs.) but both end up as 6.5 lb. adults.
Nevertheless, when you take a look at the growth rate, you will see an upward movement that stretches from birth to the 9 month mark.
If a Maltese puppy is consistently on the low end of the scale, he will most likely end up being on the low end of the standard, which is 3 to 4 lbs. And if a Maltese puppy is consistently on the higher end of the growth scale, he is more than likely going to be on the higher end of the standard, at just under 7 lbs., and in some cases a bit larger.
Most of the growing will be done in the first 6 months. For the 3 remaining months of 6 to 9 months old, there may be small adjustments in weight, height, or both.