Here’s the listing on Amazon for a small landing mat. Folds very easily with a carry bag. About the size of a large dinner plate when folded. £14 when I bought it last year.
Amazon:— Drone Landing Pad, Dji Spark Accessories Universal Waterproof Portable Drone Landing Pad, Folding for Mavic Mini/DJI Mavic Pro Phantom 2/3/4 Pro etc