If you're new to size 16 or 14 KAM plastic snaps, at first glance, you might think you received double bags of 1 piece and are missing the other piece. But take a closer look and you'll find those seemingly identical pieces are actually different.
The socket (female) has a wider center ring compared to stud (male). Snap them together and you'll find they fit perfectly.
Refer to the photo chart below to see what each piece in each size looks like.