Could someone please tell me what size power steering belt I need for a 76' 300d?

Thanks.

13.0 X 750

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Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k

Thanks, that's what I thought I bought, but it was too loose. I checked the belt number from the belt sleeve and the parts store had the wrong belt in the sleeve. I brought it back and they did not have the correct size in stock. Looks like I'll have to travel further in my search, Fastlane is also out the correct size.