Hi Smenta
If you don't mind plowing through a crazy amount of advertising, this link has great info on how to calculate what you may need for your appropriate sizes (scroll way down here):
https://www.feliciasworld.com/log-ca...g-cabin-quilt/
This one is a chart specifically for a finished size 60x88 quilt (click on the topics to the left of the chart for more info):
https://logcabinquiltingforbeginners...c-yardage.html
edit:
one more-this one walks you through figuring out what you need:
https://www.thesprucecrafts.com/calc...quilts-2821956