No
@Lowena you are not showing yourself up at all (where's that finger wagging emoji)
It would be extremely rare to get commercially produced cloth anything less than 36" (I think I might have had some handwoven Harris Tweed a tad narrower about 40 years ago) and you are not a garment maker so there is no reason for you to have ever considered what width of cloth might be needed for a garment. Until a couple of weeks ago I had absolutely no idea whatsoever that you could weave double cloth on a simple loom, I've just come across it in my weaving googlings.
I didn't interpret what you said as an insult to my ability or size at all - I simply put down my thought process on the matter - I may very well come unstuck when I actually try and do it
When I am teaching (beekeeping) I am always glad of the people who are willing to ask questions, even the most basic ones, because I am sure that there are others sitting there who were wondering the same thing but didn't like to ask and are grateful that someone else has.
So carry on asking but I know very little about this weaving lark so blind leading the blind comes to mind
Fortunately there are others who know much more than me.