MORNING
I have never purchased the batting from Walmart so no help there
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I do buy the roll from Joanns. The roll is folded in half and for some quilts, to get the width, you have to unfold it. So i am not always able to just pull it up from the roll and use it
But for a smaller size that i want it doubled, it works great that way!
On my frame i do have the bar down below to put the roll of batting on. I like it just to keep it off the floor. That is a big old roll to store anywhere!