Above you can see two pictures with straps too tight. The holes of the straps are stretched, and it should not happen.
Below you can see that the strap tightness is perfect, no stretching holes.
However, in these pictures there is 2 holes under neath the rivets. Ideal is to leave only one hole, or none.
If there is more than one hole underneath the rivets, you can cut the strap to have only one hole or none. Picture below.