If you’re a bigger person I would recommend the XL version.
I bought the small one for myself it didn’t work for me. Now my disabled adult adopted daughter sleeps with it in her wheelchair for the occasional afternoon nap and it fits perfectly in between her knees or tucked in next to her chest to lean on.
So it looks like I’m going to have to order another one that’s the XL size 😊 because as usual something I by works better for someone else than myself. Oh darn 😉😉