Oh, dude, things that come in groups of 16? Well, you've got your standard pack of 16 crayons, 16 ounces in a pound (for all you bakers out there), and hey, even a chessboard has 16 pieces at the start of the game. So, like, there you go, a bunch of stuff that comes in sweet 16s.
Soda comes in groups of 6
states
dogs
what comes in groups of 12
Arms, legs.
gaggle of geese
Inches in a foot
Pennies
scorpion legs
Case of beer
days in a week
A pair of trousers