Hi! I have a 2004 G35 sport.

I was replacing the serpentine belt today and came to realize that the OEM I bought was longer than the belts that I have on the car. Any ideas what could it be? I have a light weight pulley on the car. It's not just a tad longer but at least 1" to 1 1/2 " longer than belts that I pulled out. Thanks in advance guys!