RumbleStone Large 3.5 in. x 10.5 in. x 7 in. Cafe Concrete Garden Wall Block (96 Pcs. / 24.5 Face ft. / Pallet)

Sorry, you are all WRONG. A big concrete brick is a great product to retain soil. Just leave an extra six inches between the back of the wall and the dirt. Fill this space with gravel as you stack the wall up. Slop a 3 or 4 gallon bucket full of dirtcrete soup every so often down the dirt gravel border to help to drain the soil ahead of the wall. Also slope the wall 15 to 30 degrees into the soil. This will prevent anything short of a mudslide from pushing you brick wall out. In fact it may actually cave in backwards in a few centuries. As far as the two mathematicians answers... well, i've never stacked very many bricks on edge in any application before much less a retaining wall...I will say that. Just double Skeleton's answer and lay them FLAT just as in the picture above and use the extra bricks to lay the top coarse spun 90 degrees. It will cover most of the gravel and be a lot less likely to fall off the top. So just over $20,000.00 with tax. Labor not included. Maybe the first answer was correct after all. Myself, i would would go with the plain dirtcrete soup and a few colors of abstract limewash.

a wall would be 3.5 x 10.5 each block divided by 144 to get sq feet each x 96 blocks = 24.5 square feet a walkway or driveway would be twice as much 7 x 10.5 divided by 144 x 96 blocks = 49 square feet

It's Home Depot. My guess is to discourage those large orders and cater only to the small purchaser/homeowner.

Each pallet will cover 49 sq. ft.

If you need to go higher, you will need to establish a setback on each row to maintain stability. Mortar will hold them more securely. You do not want a small wall to tip over , especially if retaining dirt.

that depends, how many do you want on the pallet?

Fuel surcharges, weight distribution, ease of operations, static air pressure and lunch.

Pallet is heavier so you have to pay for fuel of truck and the drivers lunch

You can not mix and match to make a full pallet. If the material is available at your local Home Depot, you can buy by the piece, if you’re buying online, it’s only by the pallet. Thank you for your inquiry!

You’re building 38 linear feet of wall. 38 feet times 12 feet per inch divided by 10.5 inches per stone equals the number of stones laid end-to-end in one course. Assuming your site is level, a wall 2 feet high will need 6 courses above grade. You’ll have to decide whether to build on grade or prepare a footing below grade... that will depend on the soil and weather where you live. Unless you’re stacking the stones on a concrete pad, you’re probably going to have to dig a trench 8-10 inches deep and 8 inches wide, put in 4-6 inches of crushed rock, tamp it tight, flat and level. That means at least one, maybe 2 courses below grade. 7 or 8 courses; up to you. # stones/course times number courses divided by number stones/pallet rounded up to the next whole number equals the number of pallets you need to buy