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IThe pad sticks out 6 inches on two sides, even with the tub on the steps side and out about 1 ft on the opposite side. I wasn't thrilled about pavers around it as water, snow and ice can "pool" on the pavers and makes a dry spot hard to find.
I am happy I chose this setup for my application, if you like concrete go concrete, to each his own. I just think the handi-pads have some advantages, especially if your tub setup or location when you get it may not be permanent.