1*8 is a bar, 16*8 is 16, a bar consists of 8 beats, and the number 1 2 3 4 5 6 7 8 is a bar.
1 2 3 4 5 6 7 8
2 2 3 4 5 6 7 8
3 2 3 4 5 6 7 8
4 2 3 4 5 6 7 8
until
16 2 3 4 5 6 7 8 (we don't count 16, an 8-back 1).