Joy, sorry for the delay in replying, they run TTS. I have no waist so I get a large to accommodate, and it is roomy. If I liked a more regular fit, I’d get a medium, but I do like it loose. I’d get a Small if that is your regular, but if you need to accommodate any medical devices, perhaps up a size.
Also, got the little nylon fanny pack that Runcarla got, it is perfect for taking along the essentials, and under 20 dollars. I know you have some great bags and wrote about doubling them up? This would fit well into a tote. Washable.
Robin, I suck them up with the pants drawstring. They would be a chore to hem.