I found this:

Adult males typically weigh 100-160 grams (0.22-0.35 lbs.), while adult females weigh 80-130 grams (0.18-0.29 lbs.). Average lifespan is 5-7 years for both males and females.

However, both my mom and daughter White Faced Sugar Gliders are bigger than the male dad... they're huskier than him and weighing slightly a bit more.

Any ideas?

i have 3 males and 3 females. my biggest gliders are 2 of the females.
but don't know why for sure. they eat the least amount of snacks cause they eat
the slowest.
my smallest male is the alpha gus, he has no extra fat, he eats lots of treats,
but is always running and exploring and being the boss, active more then the others
around the room.

So, I guess my neutered male is closer to the 100g side of the male range and my two females closer to the 130g side of the female range... interesting. He IS more 'active' than the females and thus probably less 'fat'. I wonder what neutering does to a male Sugar Glider's size... I know spayed female animals typically tend to gain a lot of weight.