@@PackHacker28L was perfect for a comforter and an inflatable pillow and fits perfectly in a 14 inch wide carry on bag. Travelling with bedding is common for people volunteering or doing homestays and this is the first time I was able to do it carry on only because of this organizer.
8L is too small. I got the 12L and I still think it’s too small. Specially if you plan to use it to compress a puff jacket + some clothes for example for winter travel.