1 A retired Regular officer who also is employed by the federal government and is subject to the dual compensation statutes may have that reduction reduced because of the waiver of retired pay to receive VA benefits.
If they don't, then 4 thick is usually standard for a patio slab, how large or small it is doesn't really matter. The most important part is the sub-base. Make sure you have a good gravel base. I would recommend at least 12 inches of compacted gravel. I like gravel where the aggregate (rocks) are no larger than 1.
Rubber Patio Paver Tiles are some of the lightest weight rubber pavers available anywhere. At just 3/4 inch thick, the square outdoor rubber tiles measure 16 inches across and weight just six pounds each. The lightweight nature of the patio pavers make it easy for virtually anyone to transport and install.