Home depot is your friend in this. I would suggest as big as you can and a material you can role up, however I keep thinking of using those pads that look like puzzle pieces. Interlocking tiles they are called. The other option I would go with is rubber rolls, you can get them in 4’ X 20~30’ length the 4 foot standard is because of pickup beds.
Depending on need, desire, and cash available you have a lot of good options.
No matter if you go rubber or canvas or some other material you should be able to pant on it and store it easily.
Other options is to go to a flooring store and see what they have, when asked what you are looking for state flooring that is easy to paint a logo on, and can be easily rolled up and stored…if they ask for what, you can answer as you see fit, from modified twister, to giant ouija board, are fun answers. Telling the truth is always amusing, but that invites way too many odd questions.
A surface to do art and not damage the carpet is also good, and accurate. But the main thing you need is a good surface that can be stored.
Another idea is investing in a good hand Vac…allows using salt and other dust based items for circles and symbols. But makes it take a while for each sitting compared to mobile platform.
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--Paxx
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