I want to make a cover for a pet bed but I have no idea how to make the measurements or where to even start. I've never really done much sewing before. I can hem a pair of pants enough to get by but that's about it.
The pet bed I want to make the cover for looks something like this one
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How should I go about measuring the bed for the cover? What should I do after that? I have no idea what to do or where to start.