This seat is designed for two, but its length can vary to fit a particular location. All the materials are strips or blocks of 2x4 inch (51mm x 102mm) cedar, except for the 2x10 inch (51mm x 254mm) backrest...
When building a low retaining wall in the garden or backyard for whatever reason (maybe just to level the section a bit), including some steps into the design can make the project both practical and aesthetically pleasing...
The following are a couple simple wood plans for chairs that you might call Deck Chairs, Patio Chairs, or Garden Chairs. The first is from Lowes. The picture is linked to the free woodworking plan...