Just a heads up, the second one is only on a 26 inch bolt, but if you go with a lighter weight thats heavier than dickblick you can get 60 inches. The first one is on a 72 inch bolt.
EDIT:
I eneded up ordering this one, it's the same weight as the extra extra heavy from DickBlick:
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If you order is under $10 you can get $2 econo shipping. If I went with one a little heavier it would have cost $9.50 to ship it.
Dick Blick is $13/yard and charges $8 to ship the exact same thing.