SRS, my sister recently started doing jigsaw puzzles and has been on the hunt for a portable jigsaw board and found one which suits her jigsaw requirements. There are a few on the market and they have different methods for keeping the jigsaw pieces in place while the board is not being used.

I did a quick search and found some hits for

jigsaw board portable foldable

Some are very expensive but others are more affordable, or the information and images may help to design a workable solution at home.